I am looking for help on a puzzle I am trying to figure out. The puzzle is a series of number pairs that must somehow relate to a specific number. The only clue I have is the term "Radical". If I can get one or two I think I can get the rest on my own. The puzzle itself is a set of 15 number pairs. The first pair, the relationship of which must be 4 is:

2032- 6.2081

Other pairs which might help withthe solution are:

This Pair must be 7:
1161 8.0281-

The following two pairs both must equal 2:
7042 0.7430+
2174 9.9231

Any helpful ideas would be appriciated.