You can solve any proportion using the fundamental rule of proportions. First you must build the proportion if you are given a word problem. Decide using logic whether it is a direct proportion (more on one side means more on the other). If so, find the parts of the equation that use the same units and make a fraction with these, putting the smaller number on top. The number left over is linked with one of the other two numbers in the fractionuse logic to figure out which. Put it in the same position as the number it is linked with, and put the unknown on the other side. Now you have two fractions on either side of an equals sign. You can use cross multiplication to isolate the unknown and solve for it. If you follow this video you will understand and be able to use this principle to solve for an unknown in a proportion.
 Hot
 Latest

How To: Calculate percent composition for chemistry

How To: Calculate the height and volume of a pyramid

How To: Remember "greater than" & "less than" symbols

How To: Solve vector field integrals in calculus

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Determine the age of a fossil using carbon14

How To: Find the Volume of Composite Figures (Also Called Composite Shapes)

How To: Find the Percent Given Two Numbers

How To: Calculate the area of a parallelogram

How To: Find extra points for a parabola (quadractic equation)

How To: Find the area of triangle using fraction measurement

How To: Find a number given Its percent

How To: Find the area of a triangle when given 2 sides & angle

How To: Find the area of an oblique triangle using formulas

How To: Solve percentages without a calculator

How To: Find the Radius of a Circle from Arc Length

How To: Find the volume of a sphere with radius r

How To: Find a central angle

How To: Find an angle using alternate interior angles

How To: Find the area & perimeter of triangles & squares

How To: Calculate percent composition for chemistry

How To: Calculate the height and volume of a pyramid

How To: Remember "greater than" & "less than" symbols

How To: Solve vector field integrals in calculus

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Determine the age of a fossil using carbon14

How To: Find the Volume of Composite Figures (Also Called Composite Shapes)

How To: Find the Percent Given Two Numbers

How To: Calculate the area of a parallelogram

How To: Find extra points for a parabola (quadractic equation)

How To: Find the area of triangle using fraction measurement

How To: Find a number given Its percent

How To: Find the area of a triangle when given 2 sides & angle

How To: Find the area of an oblique triangle using formulas

How To: Solve percentages without a calculator

How To: Find the Radius of a Circle from Arc Length

How To: Find the volume of a sphere with radius r

How To: Find a central angle

How To: Find an angle using alternate interior angles

How To: Find the area & perimeter of triangles & squares
Be the First to Comment
Share Your Thoughts