Writing 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, you can cross-multiply the terms and then solve for the unknown variable.

Front

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

Back

If a/b = c/d, then ad = bc, where a, b, c, and d are numbers and one of them is unknown.

Front

What is the relationship between quarts and gallons?

Back

There are 4 quarts in 1 gallon, which means the ratio of quarts to gallons is 4:1.

Front

If a recipe requires 4 eggs for 6 cups of flour, how can you find the amount of flour needed for a different number of eggs?

Back

Set up a proportion using the original ratio of eggs to flour and solve for the unknown amount of flour.

Front

What does a score of 80% on a test indicate?

Back

A score of 80% means that 80 out of every 100 questions answered correctly, or in this case, 32 out of 40 questions.

Front

How do you convert quarts to gallons?

Back

To convert quarts to gallons, divide the number of quarts by 4.

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 and setting the two products equal to each other.

Front

If 5/8 = 20/d, how do you find d?

Back

Cross-multiply to get 5d = 160, then divide both sides by 5 to find d = 32.

Front

What is the significance of ratios in recipes?

Back

Ratios in recipes help maintain the correct proportions of ingredients to achieve the desired outcome.