jill, you should be able to draft this bigger - if I understand you, the paper pieced pattern finishes at 4 inches and you want to make the 9 patch block with 8 inch finished blocks?
Draw an 8 1/2" square, mark your 1/4" seamline inside the outer edge and then mark the halfway point each side. Draw a line to connect the bottom to the side points - there are your 4 and 5 triangles.
Find the halfway point on the long side of those triangles and connect to the center top point.