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Finding the Fourth Proportional to 12,387.28, 17,099.13 and 9,047.38

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Solution

The fourth proportional to 12,387.28, 17,099.13 and 9,047.38 is: 12,488.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.28 : 17,099.13 = 9,047.38 : x
  2. Step 2: Convert to fraction form
    12,387.28/17,099.13 = 9,047.38/x
  3. Step 3: Cross multiply
    12,387.28x = 17,099.13 × 9,047.38
  4. Step 4: Simplify right side
    12,387.28x = 154,702,326.78
  5. Step 5: Solve for x
    x = 154,702,326.78/12,387.28
  6. Step 6: Final answer
    x = 12,488.81

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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.