Wyzant
Wyzant: Proportion Calculator
Students enter problems into a proportion calculator to see the solutions. The calculator solves proportions using cross product properties.
Shmoop University
Shmoop: Ratios & Percentages: Solving Proportions
Students learn how to solve proportions. The mathematics resource consists of examples and practice problems with answers.
Wyzant
Wyzant: Basics of Proportions
This tutorial from WyzAnt on proportions describes in detail the functions of proportions and includes several examples to demonstrate how to solve proportions. The tutorial is concluded with an interactive worksheet that allows for...
Purple Math
Purplemath: Proportions: Introduction
Explains the basics and terminology of proportions.
Calculator Soup
Calculator Soup: Fractions Solve for Unknown X
Solve for an unknown value x with this fractions calculator. Find the missing fraction variable in the proportion using cross multiplication to calculate the unknown variable x. Solve the proportion between 2 fractions and calculate the...
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Proportions
Find a quick, concise explanation of proportions. An example is given and clearly explained.