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Finding the Fourth Proportional to 18,321.62, 27,480.19 and 7,795.87

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Solution

The fourth proportional to 18,321.62, 27,480.19 and 7,795.87 is: 11,692.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,321.62 : 27,480.19 = 7,795.87 : x
  2. Step 2: Convert to fraction form
    18,321.62/27,480.19 = 7,795.87/x
  3. Step 3: Cross multiply
    18,321.62x = 27,480.19 × 7,795.87
  4. Step 4: Simplify right side
    18,321.62x = 214,231,988.82
  5. Step 5: Solve for x
    x = 214,231,988.82/18,321.62
  6. Step 6: Final answer
    x = 11,692.85

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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.