Solving a word problem using proportions

The video tutorial explains how to solve a word problem involving ratios. It begins by introducing the problem, which involves finding the total number of students in a class given the ratio of girls to boys and the fact that there are three fewer girls than boys. The tutorial then explains how to represent ratios as fractions and set up an equation using variables and proportions. The solution is found through cross multiplication, and the final step involves verifying the solution to ensure it answers the original question.

What is the ratio of girls to boys in the class?

What method is used to solve for the number of students in the class?

Define the variable used to represent the number of boys in the class.

Explain the importance of defining a variable in solving this problem.

How do you check if your answer is correct after solving the problem?

How many total students are in the class?

If there are 15 boys in the class, how many girls are there?