What's the adjective for proportionably? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs proportion and proportionate which may be used as adjectives within certain contexts.
proportional
(mathematics) At a constant ratio (to). Two magnitudes (numbers) are said to be proportional if the second varies in a direct relation arithmetically to the first. Symbol: ∝.
In proportion (to), proportionate. More common in US than UK.
“A worm of proportionable enormity had bored a hole in the shell.”
“The division of labour, however, so far as it can be introduced, occasions, in every art, a proportionable increase of the productive powers of labour.”
“Herewith the clock is put in service. Mind that the clock is suspended on the wall straightly and its ticking proportionable.”