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 own coining. Fitzed. Hall.