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

What does it mean for two ratios to be proportional?

Back

Two ratios are proportional if they can be expressed as equivalent fractions.

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 is the first step in solving for x in a proportion?

Back

The first step is to set up the equation based on the given ratios.

Front

Solve for x: 1/5 = x/10

Back

x = 2.

Front

Solve for x: 3/x = 6/12

Back

x = 6.

Front

Which ratio is proportional to 1/5?

Back

2/10 is proportional to 1/5.

Front

Solve for x: 4/x = 8/16

Back

x = 2.

Front

What is the value of x in the proportion 5/x = 10/20?

Back

x = 5.