Home / 8,286.78-12,429.10-2,738.76

Finding the Fourth Proportional to 8,286.78, 12,429.10 and 2,738.76

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Solution

The fourth proportional to 8,286.78, 12,429.10 and 2,738.76 is: 4,107.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,286.78 : 12,429.10 = 2,738.76 : x
  2. Step 2: Convert to fraction form
    8,286.78/12,429.10 = 2,738.76/x
  3. Step 3: Cross multiply
    8,286.78x = 12,429.10 × 2,738.76
  4. Step 4: Simplify right side
    8,286.78x = 34,040,321.92
  5. Step 5: Solve for x
    x = 34,040,321.92/8,286.78
  6. Step 6: Final answer
    x = 4,107.79

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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.