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Finding the Fourth Proportional to 27,658.69, 38,171.95 and 16,909.87

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Solution

The fourth proportional to 27,658.69, 38,171.95 and 16,909.87 is: 23,337.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,658.69 : 38,171.95 = 16,909.87 : x
  2. Step 2: Convert to fraction form
    27,658.69/38,171.95 = 16,909.87/x
  3. Step 3: Cross multiply
    27,658.69x = 38,171.95 × 16,909.87
  4. Step 4: Simplify right side
    27,658.69x = 645,482,754.42
  5. Step 5: Solve for x
    x = 645,482,754.42/27,658.69
  6. Step 6: Final answer
    x = 23,337.43

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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.