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Finding the Fourth Proportional to 8,917.13, 13,317.13 and 7,164.79

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Solution

The fourth proportional to 8,917.13, 13,317.13 and 7,164.79 is: 10,700.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,917.13 : 13,317.13 = 7,164.79 : x
  2. Step 2: Convert to fraction form
    8,917.13/13,317.13 = 7,164.79/x
  3. Step 3: Cross multiply
    8,917.13x = 13,317.13 × 7,164.79
  4. Step 4: Simplify right side
    8,917.13x = 95,414,439.85
  5. Step 5: Solve for x
    x = 95,414,439.85/8,917.13
  6. Step 6: Final answer
    x = 10,700.13

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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.