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Finding the Fourth Proportional to 19,251.60, 28,892 and 12,996.80

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Solution

The fourth proportional to 19,251.60, 28,892 and 12,996.80 is: 19,505.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,251.60 : 28,892 = 12,996.80 : x
  2. Step 2: Convert to fraction form
    19,251.60/28,892 = 12,996.80/x
  3. Step 3: Cross multiply
    19,251.60x = 28,892 × 12,996.80
  4. Step 4: Simplify right side
    19,251.60x = 375,503,545.60
  5. Step 5: Solve for x
    x = 375,503,545.60/19,251.60
  6. Step 6: Final answer
    x = 19,505.06

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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.