Home / 21,880-28,812

Finding the Third Proportional to 21,880 and 28,812

Calculator

Solution

The third proportional to 21,880 and 28,812 is: 37,940.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,880 : 28,812 = 28,812 : x
  2. Step 2: Convert to fraction form
    21,880/28,812 = 28,812/x
  3. Step 3: Cross multiply
    21,880x = 28,812 × 28,812
  4. Step 4: Simplify right side
    21,880x = 830,131,344
  5. Step 5: Solve for x
    x = 830,131,344/21,880
  6. Step 6: Final answer
    x = 37,940.19

Related Problems

Find third proportional to 10,940 and 14,406
Half scale
Find third proportional to 43,760 and 57,624
Double scale
Find third proportional to 21,882 and 28,815
Similar ratio
Find third proportional to 32,820 and 43,218
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.