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Finding the Fourth Proportional to 8,611.15, 12,914.91 and 3,929.83

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Solution

The fourth proportional to 8,611.15, 12,914.91 and 3,929.83 is: 5,893.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.15 : 12,914.91 = 3,929.83 : x
  2. Step 2: Convert to fraction form
    8,611.15/12,914.91 = 3,929.83/x
  3. Step 3: Cross multiply
    8,611.15x = 12,914.91 × 3,929.83
  4. Step 4: Simplify right side
    8,611.15x = 50,753,400.77
  5. Step 5: Solve for x
    x = 50,753,400.77/8,611.15
  6. Step 6: Final answer
    x = 5,893.92

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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.