If I’m enlarging a photo from 5 width x 7 length , to 21 inches long, how wide will the print be?
5/7 = x/21
solve for x
To calculate the width of the enlarged photo, you can use the concept of proportionality.
First, you need to determine the proportional relationship between the original photo and the enlarged photo. In this case, you are given the original dimensions of 5 inches width by 7 inches length and the new length of 21 inches.
To find the width of the enlarged photo, you can set up a proportion:
(original width) / (original length) = (enlarged width) / (enlarged length)
Let's substitute the known values into the proportion:
5 / 7 = (enlarged width) / 21
Now, we can solve for the unknown, which is the enlarged width:
Cross multiply: (5 * 21) = (7 * (enlarged width))
105 = 7 * (enlarged width)
Divide both sides of the equation by 7 to isolate the enlarged width:
105 / 7 = enlarged width
15 = enlarged width
Therefore, the width of the enlarged photo will be 15 inches.