Solving Proportions

Front

What is a proportion?

Back

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

Front

How do you determine if two ratios are proportional?

Back

Two ratios are proportional if their cross products are equal.

Front

What is the cross product of the ratios a/b and c/d?

Back

The cross product is ad and bc. If ad = bc, then the ratios are proportional.

Front

Solve the proportion: 3/4 = x/16

Back

x = 12

Front

If 5/10 = x/20, what is x?

Back

x = 10

Front

What does it mean if two ratios are equivalent?

Back

It means they represent the same relationship or value.

Front

Solve the proportion: 2/3 = 8/x

Back

x = 12

Front

If a recipe calls for 2 cups of flour for every 3 cups of sugar, how much flour is needed for 9 cups of sugar?

Back

6 cups of flour.

Front

What is the formula for solving proportions?

Back

Cross multiply and solve for the unknown variable.

Front

If 4/5 = x/25, what is x?

Back

x = 20