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Finding the Fourth Proportional to 8,091.87, 12,138.93 and 3,648.92

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Solution

The fourth proportional to 8,091.87, 12,138.93 and 3,648.92 is: 5,473.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,091.87 : 12,138.93 = 3,648.92 : x
  2. Step 2: Convert to fraction form
    8,091.87/12,138.93 = 3,648.92/x
  3. Step 3: Cross multiply
    8,091.87x = 12,138.93 × 3,648.92
  4. Step 4: Simplify right side
    8,091.87x = 44,293,923.76
  5. Step 5: Solve for x
    x = 44,293,923.76/8,091.87
  6. Step 6: Final answer
    x = 5,473.88

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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.