Home / 20,711.54-28,581.45-11,279.90

Finding the Fourth Proportional to 20,711.54, 28,581.45 and 11,279.90

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Solution

The fourth proportional to 20,711.54, 28,581.45 and 11,279.90 is: 15,566.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.54 : 28,581.45 = 11,279.90 : x
  2. Step 2: Convert to fraction form
    20,711.54/28,581.45 = 11,279.90/x
  3. Step 3: Cross multiply
    20,711.54x = 28,581.45 × 11,279.90
  4. Step 4: Simplify right side
    20,711.54x = 322,395,897.86
  5. Step 5: Solve for x
    x = 322,395,897.86/20,711.54
  6. Step 6: Final answer
    x = 15,566.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.