I don't know what Georgia law provides, but if there were no specific instructions in the Will (such as divide it up or sell it) this is usually a matter to be decided by the executor or administrator of the estate, and his judgment would usually carry unless he acts in an arbitrary and unreasonable manner.
If each of 4 2.5 acre pieces (assuming the land was equally valuable) would be worth only $15,000 (a total of $60,000) but becasue of its value to a builder the entire 10 acre parcel as one would be worth $100,000 there is a $40,000 difference, and selling it as one parcel would make sense as each beneficiary essentially inherits $10,000 more. Now the 3 who wanted the land split could offer to buy out the 4th. If they would pay the guy who would have wanted it sold $25,000 for what would be "his" 1/4 interest in the whole, everyone would be just as well off as they would have been had the property been sold or split.