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Finding the Fourth Proportional to 8,671.38, 12,985.11 and 6,221.94

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Solution

The fourth proportional to 8,671.38, 12,985.11 and 6,221.94 is: 9,317.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,671.38 : 12,985.11 = 6,221.94 : x
  2. Step 2: Convert to fraction form
    8,671.38/12,985.11 = 6,221.94/x
  3. Step 3: Cross multiply
    8,671.38x = 12,985.11 × 6,221.94
  4. Step 4: Simplify right side
    8,671.38x = 80,792,575.31
  5. Step 5: Solve for x
    x = 80,792,575.31/8,671.38
  6. Step 6: Final answer
    x = 9,317.15

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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.