Solving Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the variable.

Front

If a/b = c/d, what is the cross-multiplication method?

Back

The cross-multiplication method states that a * d = b * c.

Front

What does it mean if two ratios are equivalent?

Back

It means that they represent the same relationship between quantities.

Front

If Sara can type 90 words in 4 minutes, how many words can she type in 1 minute?

Back

22.5 words.

Front

If 3/4 = x/16, what is the value of x?

Back

x = 12.

Front

What is the first step in solving the proportion 5/x = 10/20?

Back

Cross-multiply to get 5 * 20 = 10 * x.

Front

If a recipe calls for 2 cups of flour for every 3 cups of sugar, what is the ratio of flour to sugar?

Back

The ratio of flour to sugar is 2:3.

Front

What is the value of x in the proportion 8/x = 4/2?

Back

x = 4.

Front

If 1/2 = x/10, how do you find x?

Back

Cross-multiply to get 1 * 10 = 2 * x, so x = 5.