Home / 8,999-21,020

Finding the Third Proportional to 8,999 and 21,020

Calculator

Solution

The third proportional to 8,999 and 21,020 is: 49,098.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999 : 21,020 = 21,020 : x
  2. Step 2: Convert to fraction form
    8,999/21,020 = 21,020/x
  3. Step 3: Cross multiply
    8,999x = 21,020 × 21,020
  4. Step 4: Simplify right side
    8,999x = 441,840,400
  5. Step 5: Solve for x
    x = 441,840,400/8,999
  6. Step 6: Final answer
    x = 49,098.83

Related Problems

Find third proportional to 4,499.50 and 10,510
Half scale
Find third proportional to 17,998 and 42,040
Double scale
Find third proportional to 9,001 and 21,025
Similar ratio
Find third proportional to 13,498.50 and 31,530
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.