proportionate
adjective
verb
°To make proportionate.

proportion
noun
°a quantity of something that is part of the whole amount or number.
°harmonious relation of parts to each other or to the whole.
verb
°To set or render in proportion.

diminish
verb
°To make smaller.
°To become smaller.

extent
noun
°A range of values or locations.
°The space, area, volume, etc., to which something extends.