Sure.
-- One group gets 4 shares, and the other group gets 7 shares,
so both groups all together get (4 + 7) = 11 shares.
-- To cut up 33 into 11 shares, there are (33/11) = 3 things in each share.
-- The first group gets 4 shares = (4 x 3) = 12 things
-- The second group gets 7 shares = (7 x 3) = 21 things
Check:
(12 + 21) = 33 . . . . . the whole pot
12 / 21 = 4 / 7 . . . . . the ratio you wanted