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Finding the Fourth Proportional to 15,721.52, 23,595.78 and 8,331.17

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Solution

The fourth proportional to 15,721.52, 23,595.78 and 8,331.17 is: 12,503.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.52 : 23,595.78 = 8,331.17 : x
  2. Step 2: Convert to fraction form
    15,721.52/23,595.78 = 8,331.17/x
  3. Step 3: Cross multiply
    15,721.52x = 23,595.78 × 8,331.17
  4. Step 4: Simplify right side
    15,721.52x = 196,580,454.46
  5. Step 5: Solve for x
    x = 196,580,454.46/15,721.52
  6. Step 6: Final answer
    x = 12,503.91

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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.