Home / 20,666.28-28,519.50-11,234.85

Finding the Fourth Proportional to 20,666.28, 28,519.50 and 11,234.85

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Solution

The fourth proportional to 20,666.28, 28,519.50 and 11,234.85 is: 15,504.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.28 : 28,519.50 = 11,234.85 : x
  2. Step 2: Convert to fraction form
    20,666.28/28,519.50 = 11,234.85/x
  3. Step 3: Cross multiply
    20,666.28x = 28,519.50 × 11,234.85
  4. Step 4: Simplify right side
    20,666.28x = 320,412,304.58
  5. Step 5: Solve for x
    x = 320,412,304.58/20,666.28
  6. Step 6: Final answer
    x = 15,504.11

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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.