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Finding the Fourth Proportional to 18,791.88, 28,188.72 and 15,498.87

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Solution

The fourth proportional to 18,791.88, 28,188.72 and 15,498.87 is: 23,249.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.88 : 28,188.72 = 15,498.87 : x
  2. Step 2: Convert to fraction form
    18,791.88/28,188.72 = 15,498.87/x
  3. Step 3: Cross multiply
    18,791.88x = 28,188.72 × 15,498.87
  4. Step 4: Simplify right side
    18,791.88x = 436,893,306.75
  5. Step 5: Solve for x
    x = 436,893,306.75/18,791.88
  6. Step 6: Final answer
    x = 23,249.05

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Similar ratio
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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.