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Finding the Fourth Proportional to 38,671.80, 58,007.70 and 12,377.40

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Solution

The fourth proportional to 38,671.80, 58,007.70 and 12,377.40 is: 18,566.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,671.80 : 58,007.70 = 12,377.40 : x
  2. Step 2: Convert to fraction form
    38,671.80/58,007.70 = 12,377.40/x
  3. Step 3: Cross multiply
    38,671.80x = 58,007.70 × 12,377.40
  4. Step 4: Simplify right side
    38,671.80x = 717,984,505.98
  5. Step 5: Solve for x
    x = 717,984,505.98/38,671.80
  6. Step 6: Final answer
    x = 18,566.10

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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.