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Finding the Fourth Proportional to 38,690.46, 58,042.98 and 12,393

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Solution

The fourth proportional to 38,690.46, 58,042.98 and 12,393 is: 18,591.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,690.46 : 58,042.98 = 12,393 : x
  2. Step 2: Convert to fraction form
    38,690.46/58,042.98 = 12,393/x
  3. Step 3: Cross multiply
    38,690.46x = 58,042.98 × 12,393
  4. Step 4: Simplify right side
    38,690.46x = 719,326,651.14
  5. Step 5: Solve for x
    x = 719,326,651.14/38,690.46
  6. Step 6: Final answer
    x = 18,591.84

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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.