In this math lesson we will learn how to solve a proportion word problem. Watch the video to learn how to set up a proportion, solve it, and interpret the answer.
Definition
A proportion is a statement that two ratios (or fractions) are equal. The cross products of the terms in a proportion are equal.
15/20 = 12/16 is a proportion (the two ratios are 15/20 and 9/16)
To write the cross products, multiply the numerator of the first fraction with the denominator of the second one; and then the denominator of the first fraction with the numerator of the second one.
15 x 16 = 20 x 12
240 = 240 (true)
You can use proportions to solve all types of problems. Often, one of the terms in the proportion is unknown. To solve a proportion means to find the value of the unknown term, so that when you replace the variable with that value, you get a true statement.
Just updated your iPhone? You'll find new emoji, enhanced security, podcast transcripts, Apple Cash virtual numbers, and other useful features. There are even new additions hidden within Safari. Find out what's new and changed on your iPhone with the iOS 17.4 update.
Be the First to Comment
Share Your Thoughts