Answer:
The answer is extremes
Step-by-step explanation:
Extremes in a proportion, the extremes are the values of the proportion that are furthest apart when written in ratio form using a colon. For example: In the proportion a : b = c : d, a and d are the extremes.
https://www.ck12.org/book/ck-12-middle-school-math-concepts-grade-7/r4/section/5.11/