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Finding the Fourth Proportional to 16,791.62, 25,138.80 and 12,649.08

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Solution

The fourth proportional to 16,791.62, 25,138.80 and 12,649.08 is: 18,936.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,791.62 : 25,138.80 = 12,649.08 : x
  2. Step 2: Convert to fraction form
    16,791.62/25,138.80 = 12,649.08/x
  3. Step 3: Cross multiply
    16,791.62x = 25,138.80 × 12,649.08
  4. Step 4: Simplify right side
    16,791.62x = 317,982,692.30
  5. Step 5: Solve for x
    x = 317,982,692.30/16,791.62
  6. Step 6: Final answer
    x = 18,936.98

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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.