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Finding the Fourth Proportional to 8,611.16, 12,914.90 and 3,929.84

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Solution

The fourth proportional to 8,611.16, 12,914.90 and 3,929.84 is: 5,893.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.16 : 12,914.90 = 3,929.84 : x
  2. Step 2: Convert to fraction form
    8,611.16/12,914.90 = 3,929.84/x
  3. Step 3: Cross multiply
    8,611.16x = 12,914.90 × 3,929.84
  4. Step 4: Simplify right side
    8,611.16x = 50,753,490.62
  5. Step 5: Solve for x
    x = 50,753,490.62/8,611.16
  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.