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 4 big water bottles hold 8 gallons, how much does 1 big water bottle hold?

Back

2 gallons.

Front

If there are 5 ice cream cones for every 3 brownies, what is the ratio of ice cream cones to brownies?

Back

5:3.

Front

If 50 apples cost $25, what is the cost of 1 apple?

Back

$0.50.

Front

If 3 big water bottles hold 6 gallons, how much does each bottle hold?

Back

2 gallons.

Front

What is the unit rate of cost per slice of pizza if 8 slices cost $12?

Back

$1.50 per slice.

Front

If 24 brownies are sold, how many ice cream cones are sold if the ratio is 5:3?

Back

40 ice cream cones.

Front

If 75 apples cost $37.50, what is the cost of 100 apples?

Back

$50.00.

Front

What is cross-multiplication in solving proportions?

Back

Cross-multiplication involves multiplying the numerator of one ratio by the denominator of the other ratio.