Solving a literal equation that is a proportion ex 13, x/a = y/b; solve for x

The video tutorial explains how to work with proportions by setting two ratios equal to each other. It introduces the concept of cross products to simplify the equation and solve for a variable. The process involves multiplying across the equation sign and isolating the variable by dividing. The tutorial concludes with a brief summary of the steps involved.

What is a proportion in mathematical terms?

• A sum of numbers

• A ratio set equal to another ratio

• A difference between two numbers

• A single number

What is the first step in applying the cross product to a proportion?

• Add the ratios

• Divide the cross products

• Multiply the cross products

• Subtract the ratios

After applying the cross product, what equation do we get?

• X / B = A / Y

• X + B = A + Y

• X * B = A * Y

• X - B = A - Y

How do you isolate X in the equation X * B = A * Y?

• Subtract B from both sides

• Multiply both sides by B

• Add B to both sides

• Divide both sides by B

What is the final expression for X after solving the equation?

• X = A * Y * B

• X = A * Y / B

• X = A + Y / B

• X = A / Y * B