Ratio & Proportion Word Problems

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

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 2 pounds of meat serve 5 people, how many pounds are needed for 13 people?

Back

5.2 pounds.

Front

If 1 Super Giant Pizza feeds 3 people, how many pizzas are needed for 36 people?

Back

12 pizzas.

Front

What is the formula to find the missing value in a proportion?

Back

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

Front

If a recipe requires 5 parts of one ingredient and 3 parts of another, what is the total number of parts?

Back

8 parts.

Front

If 2 cans of yellow paint are used in a mix of 5 parts yellow to 3 parts blue, how many cans of blue are needed?

Back

1.2 cans of blue.

Front

What is the first step in solving a word problem involving ratios?

Back

Identify the quantities involved and their relationships.

Front

How can you check if two ratios are equivalent?

Back

Cross-multiply and see if the products are equal.