Wole Oyeyele
If you are really concerned at accuracy not only a 4 blade but the right diameter as well. One without the other is a bit pointless for scale effect.
The problem is a 4 blade of something like the right diameter (6"?) will require twice the power from the motor which it will not be able to provide.
To deliver the same power with the scale diameter would require a motor that turns slower with a rather lower kV value of the current motor. I doubt such exists without it also being quite a bit heavier so you would actually need
more power to compensate for that as well as the lower 4 blade efficiency. You then might need a bigger battery too. Can you see where this is going?
As FDS says it may possible but the attraction of staying with the designed prop and motor is strong.
There is of course nothing stopping you fitting a scale four blade prop to look at, just don't fly with It.