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Finding the Fourth Proportional to 8,269.45, 12,385.95 and 8,087.20

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Solution

The fourth proportional to 8,269.45, 12,385.95 and 8,087.20 is: 12,112.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,269.45 : 12,385.95 = 8,087.20 : x
  2. Step 2: Convert to fraction form
    8,269.45/12,385.95 = 8,087.20/x
  3. Step 3: Cross multiply
    8,269.45x = 12,385.95 × 8,087.20
  4. Step 4: Simplify right side
    8,269.45x = 100,167,654.84
  5. Step 5: Solve for x
    x = 100,167,654.84/8,269.45
  6. Step 6: Final answer
    x = 12,112.98

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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.