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 3/4 = x/16, what is x?

Back

x = 12

Front

What is the cross-multiplication method?

Back

The cross-multiplication method involves multiplying the numerator of one ratio by the denominator of the other ratio.

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

If 5/8 = x/32, what is x?

Back

x = 20

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together.

Front

If a car travels 150 miles in 3 hours, what is the unit rate in miles per hour?

Back

The unit rate is 50 miles per hour.

Front

If 4 apples cost $2, how much do 10 apples cost?

Back

$5

Front

What is the formula for finding a missing value in a proportion?

Back

If a/b = c/d, then ad = bc.