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Finding the Fourth Proportional to 18,387.71, 27,577.90 and 5,057.25

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Solution

The fourth proportional to 18,387.71, 27,577.90 and 5,057.25 is: 7,584.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,387.71 : 27,577.90 = 5,057.25 : x
  2. Step 2: Convert to fraction form
    18,387.71/27,577.90 = 5,057.25/x
  3. Step 3: Cross multiply
    18,387.71x = 27,577.90 × 5,057.25
  4. Step 4: Simplify right side
    18,387.71x = 139,468,334.78
  5. Step 5: Solve for x
    x = 139,468,334.78/18,387.71
  6. Step 6: Final answer
    x = 7,584.87

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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.