of an appropriate size, amount, or degree in comparison with something Salary is proportional to years of experience. The number of teachers appointed is proportional to the total number of students. to be directly/inversely proportional to something
NAmE//prəˈpɔrʃənəli//
adverb Families with children spend proportionally less per person than families without children.See proportional in the Oxford Advanced Learner's DictionaryCheck pronunciation: proportional