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Finding the Fourth Proportional to 8,717.64, 13,067.28 and 2,872.68

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Solution

The fourth proportional to 8,717.64, 13,067.28 and 2,872.68 is: 4,305.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,717.64 : 13,067.28 = 2,872.68 : x
  2. Step 2: Convert to fraction form
    8,717.64/13,067.28 = 2,872.68/x
  3. Step 3: Cross multiply
    8,717.64x = 13,067.28 × 2,872.68
  4. Step 4: Simplify right side
    8,717.64x = 37,538,113.91
  5. Step 5: Solve for x
    x = 37,538,113.91/8,717.64
  6. Step 6: Final answer
    x = 4,305.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.