Pro·por·tion·a·ble a. Capable of being proportioned, or made proportional; also, proportional; proportionate. -- Pro*por*tion*a*ble*ness, n.
But eloquence may exist without a proportionable degree of wisdom. --Burke.
Proportionable, which is no longer much favored, was of our [i. e., English writers'] own coining. --Fitzed. Hall.
adj : proportionate