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Finding the Fourth Proportional to 15,710.92, 21,680.02 and 8,637

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Solution

The fourth proportional to 15,710.92, 21,680.02 and 8,637 is: 11,918.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,710.92 : 21,680.02 = 8,637 : x
  2. Step 2: Convert to fraction form
    15,710.92/21,680.02 = 8,637/x
  3. Step 3: Cross multiply
    15,710.92x = 21,680.02 × 8,637
  4. Step 4: Simplify right side
    15,710.92x = 187,250,332.74
  5. Step 5: Solve for x
    x = 187,250,332.74/15,710.92
  6. Step 6: Final answer
    x = 11,918.48

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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.