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Finding the Fourth Proportional to 15,387, 21,234.06 and 8,763

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Solution

The fourth proportional to 15,387, 21,234.06 and 8,763 is: 12,092.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,387 : 21,234.06 = 8,763 : x
  2. Step 2: Convert to fraction form
    15,387/21,234.06 = 8,763/x
  3. Step 3: Cross multiply
    15,387x = 21,234.06 × 8,763
  4. Step 4: Simplify right side
    15,387x = 186,074,067.78
  5. Step 5: Solve for x
    x = 186,074,067.78/15,387
  6. Step 6: Final answer
    x = 12,092.94

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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.