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Finding the Fourth Proportional to 11,287.92, 15,540.95 and 9,691.41

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Solution

The fourth proportional to 11,287.92, 15,540.95 and 9,691.41 is: 13,342.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,287.92 : 15,540.95 = 9,691.41 : x
  2. Step 2: Convert to fraction form
    11,287.92/15,540.95 = 9,691.41/x
  3. Step 3: Cross multiply
    11,287.92x = 15,540.95 × 9,691.41
  4. Step 4: Simplify right side
    11,287.92x = 150,613,718.24
  5. Step 5: Solve for x
    x = 150,613,718.24/11,287.92
  6. Step 6: Final answer
    x = 13,342.91

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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.