Home / 20,666.20-28,518.56-11,234.76

Finding the Fourth Proportional to 20,666.20, 28,518.56 and 11,234.76

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Solution

The fourth proportional to 20,666.20, 28,518.56 and 11,234.76 is: 15,503.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.20 : 28,518.56 = 11,234.76 : x
  2. Step 2: Convert to fraction form
    20,666.20/28,518.56 = 11,234.76/x
  3. Step 3: Cross multiply
    20,666.20x = 28,518.56 × 11,234.76
  4. Step 4: Simplify right side
    20,666.20x = 320,399,276.53
  5. Step 5: Solve for x
    x = 320,399,276.53/20,666.20
  6. Step 6: Final answer
    x = 15,503.54

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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.