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Finding the Fourth Proportional to 12,987.31, 17,914.17 and 9,006.97

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Solution

The fourth proportional to 12,987.31, 17,914.17 and 9,006.97 is: 12,423.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,987.31 : 17,914.17 = 9,006.97 : x
  2. Step 2: Convert to fraction form
    12,987.31/17,914.17 = 9,006.97/x
  3. Step 3: Cross multiply
    12,987.31x = 17,914.17 × 9,006.97
  4. Step 4: Simplify right side
    12,987.31x = 161,352,380.76
  5. Step 5: Solve for x
    x = 161,352,380.76/12,987.31
  6. Step 6: Final answer
    x = 12,423.85

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1.5x scale

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.