Question

Beth wants to make an enlargement of a photograph she has and give it as a gift to her grandma. The picture Beth has measures 4 inches by 6 inches. Beth's grandma has a frame with a side of 10 (See below)

When Beth goes to the photoshop, the technician asks Beth for a scale factor for the enlargement. What number does Beth need to tell him for the right size?
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Answer 1

The second side would be 15 inches.

Explanation:

In order to determine the other side, create a proportion. On the left side, use the original dimensions. On the right side, use the new dimensions with x as the unknown.

4/6 = 10/x

Now cross multiply to solve.

10*6 = 4*x

60 = 4x

15 = x