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Finding the Fourth Proportional to 15,876.52, 21,909.56 and 8,804

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Solution

The fourth proportional to 15,876.52, 21,909.56 and 8,804 is: 12,149.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,876.52 : 21,909.56 = 8,804 : x
  2. Step 2: Convert to fraction form
    15,876.52/21,909.56 = 8,804/x
  3. Step 3: Cross multiply
    15,876.52x = 21,909.56 × 8,804
  4. Step 4: Simplify right side
    15,876.52x = 192,891,766.24
  5. Step 5: Solve for x
    x = 192,891,766.24/15,876.52
  6. Step 6: Final answer
    x = 12,149.50

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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.