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Finding the Fourth Proportional to 18,774.16, 28,175.11 and 15,120.49

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Solution

The fourth proportional to 18,774.16, 28,175.11 and 15,120.49 is: 22,691.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.16 : 28,175.11 = 15,120.49 : x
  2. Step 2: Convert to fraction form
    18,774.16/28,175.11 = 15,120.49/x
  3. Step 3: Cross multiply
    18,774.16x = 28,175.11 × 15,120.49
  4. Step 4: Simplify right side
    18,774.16x = 426,021,469.00
  5. Step 5: Solve for x
    x = 426,021,469.00/18,774.16
  6. Step 6: Final answer
    x = 22,691.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.