It will be in a ratio, to ensure it is easily divided. The top 3 take the bigger chunk while 4-10th take consolation prizes. It will be according to a ratio of something like 6:4:2:1(first 4) and then 5th to 10th take 0.5 ratio each.

So basically;
1st takes 6/16 of the total prize pool
2nd takes 4/16
3rd 2/16
4th 1/16
5th to 10th take 0.5/16 each

It is still subject to adjustment if required but we're working with this kind of idea to ensure that the reward can easily be divided among winners.