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Finding the Fourth Proportional to 18,866.52, 28,286.11 and 8,871.93

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Solution

The fourth proportional to 18,866.52, 28,286.11 and 8,871.93 is: 13,301.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.52 : 28,286.11 = 8,871.93 : x
  2. Step 2: Convert to fraction form
    18,866.52/28,286.11 = 8,871.93/x
  3. Step 3: Cross multiply
    18,866.52x = 28,286.11 × 8,871.93
  4. Step 4: Simplify right side
    18,866.52x = 250,952,398.98
  5. Step 5: Solve for x
    x = 250,952,398.98/18,866.52
  6. Step 6: Final answer
    x = 13,301.47

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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.