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Finding the Fourth Proportional to 39,677.88, 59,542.74 and 18,903

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Solution

The fourth proportional to 39,677.88, 59,542.74 and 18,903 is: 28,366.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,677.88 : 59,542.74 = 18,903 : x
  2. Step 2: Convert to fraction form
    39,677.88/59,542.74 = 18,903/x
  3. Step 3: Cross multiply
    39,677.88x = 59,542.74 × 18,903
  4. Step 4: Simplify right side
    39,677.88x = 1,125,536,414.22
  5. Step 5: Solve for x
    x = 1,125,536,414.22/39,677.88
  6. Step 6: Final answer
    x = 28,366.85

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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.