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 two ratios and set the products equal to each other.

Front

If 4 big water bottles hold 8 gallons, how much do 3 big water bottles hold?

Back

6 gallons

Front

If 50 apples cost $25.00, how much do 75 apples cost?

Back

$37.50

Front

A car travels 120 miles in 3 hours. How long to travel 200 miles?

Back

5 hours

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity of one.

Front

If Josh bought a pizza with 8 slices for $12, what is the cost per slice?

Back

$1.50

Front

If there are 5 ice cream cones for every 3 brownies, how many cones for 24 brownies?

Back

40 ice cream cones

Front

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

Back

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

Front

What does it mean if two ratios are equivalent?

Back

It means they represent the same relationship between quantities.