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Finding the Fourth Proportional to 8,917.65, 13,376.61 and 4,238.14

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Solution

The fourth proportional to 8,917.65, 13,376.61 and 4,238.14 is: 6,357.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,917.65 : 13,376.61 = 4,238.14 : x
  2. Step 2: Convert to fraction form
    8,917.65/13,376.61 = 4,238.14/x
  3. Step 3: Cross multiply
    8,917.65x = 13,376.61 × 4,238.14
  4. Step 4: Simplify right side
    8,917.65x = 56,691,945.91
  5. Step 5: Solve for x
    x = 56,691,945.91/8,917.65
  6. Step 6: Final answer
    x = 6,357.27

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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.