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Finding the Fourth Proportional to 18,591.31, 25,646.50 and 11,869.87

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Solution

The fourth proportional to 18,591.31, 25,646.50 and 11,869.87 is: 16,374.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,591.31 : 25,646.50 = 11,869.87 : x
  2. Step 2: Convert to fraction form
    18,591.31/25,646.50 = 11,869.87/x
  3. Step 3: Cross multiply
    18,591.31x = 25,646.50 × 11,869.87
  4. Step 4: Simplify right side
    18,591.31x = 304,420,685.07
  5. Step 5: Solve for x
    x = 304,420,685.07/18,591.31
  6. Step 6: Final answer
    x = 16,374.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.