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Finding the Fourth Proportional to 8,671.41, 12,994.31 and 3,979.85

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Solution

The fourth proportional to 8,671.41, 12,994.31 and 3,979.85 is: 5,963.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,671.41 : 12,994.31 = 3,979.85 : x
  2. Step 2: Convert to fraction form
    8,671.41/12,994.31 = 3,979.85/x
  3. Step 3: Cross multiply
    8,671.41x = 12,994.31 × 3,979.85
  4. Step 4: Simplify right side
    8,671.41x = 51,715,319.78
  5. Step 5: Solve for x
    x = 51,715,319.78/8,671.41
  6. Step 6: Final answer
    x = 5,963.89

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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.