If 1 inch = 1 foot then 1 foot = 1 inch. With this, you can make a ratio of 1 foot:1 inch, or 1:1. Starting with the first dimension, 27 feet, just change the 1 to 27 in the ratio. 27:? To find how many inches this is in the scale drawing, find how much 1 had to be multiplied by to get to 27. This is 27, since anything times 1 is itself. Just multiply the other side by 27 as well to get the answer for the first dimension. 1 • 27 = 27 So 27 feet = 27 inches in the scale drawing. Now do the same for the second dimension. 1:1 20:? 1 • 20 = 20 20:20 The answer is that the scale drawing has dimensions of 27 inches by 20 inches if 1 inch = 1 foot is the scale
