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Finding the Fourth Proportional to 15,710.12, 21,680.04 and 8,637

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Solution

The fourth proportional to 15,710.12, 21,680.04 and 8,637 is: 11,919.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,710.12 : 21,680.04 = 8,637 : x
  2. Step 2: Convert to fraction form
    15,710.12/21,680.04 = 8,637/x
  3. Step 3: Cross multiply
    15,710.12x = 21,680.04 × 8,637
  4. Step 4: Simplify right side
    15,710.12x = 187,250,505.48
  5. Step 5: Solve for x
    x = 187,250,505.48/15,710.12
  6. Step 6: Final answer
    x = 11,919.10

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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.