Home / 8,439.20-12,660.97-3,243.68

Finding the Fourth Proportional to 8,439.20, 12,660.97 and 3,243.68

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Solution

The fourth proportional to 8,439.20, 12,660.97 and 3,243.68 is: 4,866.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.20 : 12,660.97 = 3,243.68 : x
  2. Step 2: Convert to fraction form
    8,439.20/12,660.97 = 3,243.68/x
  3. Step 3: Cross multiply
    8,439.20x = 12,660.97 × 3,243.68
  4. Step 4: Simplify right side
    8,439.20x = 41,068,135.17
  5. Step 5: Solve for x
    x = 41,068,135.17/8,439.20
  6. Step 6: Final answer
    x = 4,866.35

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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.