Home / 20,605.31-28,434.20-11,654.61

Finding the Fourth Proportional to 20,605.31, 28,434.20 and 11,654.61

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Solution

The fourth proportional to 20,605.31, 28,434.20 and 11,654.61 is: 16,082.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.31 : 28,434.20 = 11,654.61 : x
  2. Step 2: Convert to fraction form
    20,605.31/28,434.20 = 11,654.61/x
  3. Step 3: Cross multiply
    20,605.31x = 28,434.20 × 11,654.61
  4. Step 4: Simplify right side
    20,605.31x = 331,389,453.39
  5. Step 5: Solve for x
    x = 331,389,453.39/20,605.31
  6. Step 6: Final answer
    x = 16,082.72

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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.