2009 Pascal Problem 16

In the diagram, a 4\times 9 grid PQTV is formed from thirty-six 1\times 1 squares. Lines PR and US are drawn with R and S on QT. What is the ratio of the shaded area to the unshaded area?

\textbf{(A)}\ 5:9\quad \textbf{(B)}\ 9:8\quad \textbf{(C)}\ 4:5\quad \textbf{(D)}\ 9:5\quad \textbf{(E)}\ 5:4

If there are no answer choices shown, enter a numerical answer.

Full credit to this problem is given to the CEMC, you may view all Pascal contests here.