I have to agree with Mark. If you can’t figure this out on your own, you should really stay far away from dangerous chemicals like this. 

But…honestly, why aren’t you figuring this out experimentally? Start with 1 gram of SA and 2 grams of PG, and keep adding PG until soluble. The fact that you didn’t realize this was the fastest way to get your answer is yet another reason you shouldn’t be doing this yourself.