The Collaborative International Dictionary
Proportionableness
Proportionable \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.
Wiktionary
proportionableness
n. Quality of being proportionable.