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It is sometimes impractical to make engineering drawings full size. If the part to be drawn is very large or small, a scale drawing is generally made. The scale, which is shown on the drawing, compares the lengths of the lines on the drawing to the dimensions on the part. A scale on a drawing that states means the drawing is one-quarter the size of the part. It is expressed as a ratio of 1 : 4 or . A scale drawing that states 2” 5 1” means that the drawing is double the size of the part. It is expressed as a ratio of 2 : 1 or . The actual dimensions of a steel support are given in Figure 20-11. All dimensions are in inches. Using the proportion given, compute the lengths for each unknown in the table. Round the answers to 3 decimal places where necessary.