Final answer:
To enlarge a 4 x 6 picture frame with a length of 6, the resulting width of the picture frame would be 8 inches.
Step-by-step explanation:
To enlarge a 4 x 6 picture frame with a length of 6, you can use the scale factor to determine the resulting width. The dimensions of the larger square are twice the dimensions of the first square, so the side length of the larger square would be 4 inches x 2 = 8 inches. The picture frame would therefore end up being 8 inches wide. Thus, answer to the given question is 8 inches.