The art club has made a scale drawing of the new mural they will paint on the wall of the school. The area of the actual mural is
Recall that area is always written in units
This means that the ratio of of the two areas is
To find the ratio of the sides, find the square root of the ratio of the two areas.
This is the ratio of the side lengths of the larger mural to that of the scale drawing. The scale factor is therefore