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Finding the Fourth Proportional to 8,917.62, 13,317.89 and 7,165.29

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Solution

The fourth proportional to 8,917.62, 13,317.89 and 7,165.29 is: 10,700.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,917.62 : 13,317.89 = 7,165.29 : x
  2. Step 2: Convert to fraction form
    8,917.62/13,317.89 = 7,165.29/x
  3. Step 3: Cross multiply
    8,917.62x = 13,317.89 × 7,165.29
  4. Step 4: Simplify right side
    8,917.62x = 95,426,508.21
  5. Step 5: Solve for x
    x = 95,426,508.21/8,917.62
  6. Step 6: Final answer
    x = 10,700.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.