adjective
or rate·able ˈ ̷ ̷ ̷ ̷_bəl
Etymology: rate (I) + -able
1. : capable of being rated or estimated
ratable taking of gas — W.F.Cloud
2. : made or reckoned according to a proportionate rate : proportional
a ratable distribution of an estate
3. Britain : taxable
the ratable value of property
the analysis of ratable values — Country Life