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Finding the Fourth Proportional to 18,958, 28,380.82 and 14,049.66

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Solution

The fourth proportional to 18,958, 28,380.82 and 14,049.66 is: 21,032.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,958 : 28,380.82 = 14,049.66 : x
  2. Step 2: Convert to fraction form
    18,958/28,380.82 = 14,049.66/x
  3. Step 3: Cross multiply
    18,958x = 28,380.82 × 14,049.66
  4. Step 4: Simplify right side
    18,958x = 398,740,871.52
  5. Step 5: Solve for x
    x = 398,740,871.52/18,958
  6. Step 6: Final answer
    x = 21,032.86

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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.