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Finding the Fourth Proportional to 9,272.91, 12,789.17 and 8,151.47

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Solution

The fourth proportional to 9,272.91, 12,789.17 and 8,151.47 is: 11,242.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,272.91 : 12,789.17 = 8,151.47 : x
  2. Step 2: Convert to fraction form
    9,272.91/12,789.17 = 8,151.47/x
  3. Step 3: Cross multiply
    9,272.91x = 12,789.17 × 8,151.47
  4. Step 4: Simplify right side
    9,272.91x = 104,250,535.58
  5. Step 5: Solve for x
    x = 104,250,535.58/9,272.91
  6. Step 6: Final answer
    x = 11,242.48

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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.