pro ‧ por ‧ tion ‧ al AC /prəˈpɔːʃ ə nəl $ -ˈpɔːr-/ BrE AmE adjective
[ Word Family: adverb : ↑ proportionally , ↑ proportionately ; adjective : ↑ proportional , ↑ proportionate ; verb : ↑ proportion ; noun : ↑ proportion ]
something that is proportional to something else is in the correct or most suitable relationship to it in size, amount, importance etc OPP disproportionate
The punishment should be proportional to the crime.
The fee charged by the realtor is directly proportional to the price of the property.
a proportional increase in costs