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Exercises Numbers, fractions and percents

Example 6.44 from Prealgebra, 6.5 Solve Proportions and their Applications

Solve Proportions and their Applications: example 6.44

Solve: $\frac{52}{91} = \frac{−4}{y} .$

Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.

Solution

Find the cross products and set them equal.

Simplify.

Divide both sides by 52.

Simplify.

Check:

Show common factors.

Simplify.

Your turn

The book's Try It right after this example: same idea, new numbers. Only the answer is given.

Solve the proportion: $\frac{84}{98} = \frac{−6}{x} .$

How did it go?

PreviousSolve Proportions and their Applications: example 6.43 Next Solve Proportions and their Applications: example 6.45

From Prealgebra (1st edition) by OpenStax (Rice University), section 6.5, licensed under CC BY 4.0. Original at openstax.org. We split the solution into steps; the words, numbers and figures are the book's. OpenStax doesn't endorse this site.