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Finding the Fourth Proportional to 12,249.60, 16,909.20 and 8,059.20

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Solution

The fourth proportional to 12,249.60, 16,909.20 and 8,059.20 is: 11,124.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,249.60 : 16,909.20 = 8,059.20 : x
  2. Step 2: Convert to fraction form
    12,249.60/16,909.20 = 8,059.20/x
  3. Step 3: Cross multiply
    12,249.60x = 16,909.20 × 8,059.20
  4. Step 4: Simplify right side
    12,249.60x = 136,274,624.64
  5. Step 5: Solve for x
    x = 136,274,624.64/12,249.60
  6. Step 6: Final answer
    x = 11,124.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.