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 unknown variable.

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 the proportion 3/x = 6/12?

Back

Cross-multiply to get 3*12 = 6*x.

Front

What is the solution to the proportion 3/x = 6/12?

Back

x = 6.

Front

If 5/10 = x/20, how do you find x?

Back

Cross-multiply: 5*20 = 10*x, so x = 10.

Front

What does it mean if two ratios are equivalent?

Back

It means that they represent the same relationship or proportion.

Front

How can you check if two fractions are in proportion?

Back

You can check by cross-multiplying and seeing if the products are equal.

Front

What is the value of x in the proportion 4/x = 8/16?

Back

x = 2.

Front

If a recipe calls for 2 cups of flour for 4 servings, how much flour is needed for 10 servings?

Back

5 cups of flour.