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Finding the Fourth Proportional to 10,991.80, 16,487.46 and 2,671.86

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Solution

The fourth proportional to 10,991.80, 16,487.46 and 2,671.86 is: 4,007.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.80 : 16,487.46 = 2,671.86 : x
  2. Step 2: Convert to fraction form
    10,991.80/16,487.46 = 2,671.86/x
  3. Step 3: Cross multiply
    10,991.80x = 16,487.46 × 2,671.86
  4. Step 4: Simplify right side
    10,991.80x = 44,052,184.88
  5. Step 5: Solve for x
    x = 44,052,184.88/10,991.80
  6. Step 6: Final answer
    x = 4,007.73

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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.