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Finding the Fourth Proportional to 38,671.39, 57,994.72 and 12,369.88

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Solution

The fourth proportional to 38,671.39, 57,994.72 and 12,369.88 is: 18,550.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,671.39 : 57,994.72 = 12,369.88 : x
  2. Step 2: Convert to fraction form
    38,671.39/57,994.72 = 12,369.88/x
  3. Step 3: Cross multiply
    38,671.39x = 57,994.72 × 12,369.88
  4. Step 4: Simplify right side
    38,671.39x = 717,387,727.03
  5. Step 5: Solve for x
    x = 717,387,727.03/38,671.39
  6. Step 6: Final answer
    x = 18,550.86

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1.5x scale

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.