Home / 8,171.25-12,260.91-3,240.78

Finding the Fourth Proportional to 8,171.25, 12,260.91 and 3,240.78

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Solution

The fourth proportional to 8,171.25, 12,260.91 and 3,240.78 is: 4,862.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,171.25 : 12,260.91 = 3,240.78 : x
  2. Step 2: Convert to fraction form
    8,171.25/12,260.91 = 3,240.78/x
  3. Step 3: Cross multiply
    8,171.25x = 12,260.91 × 3,240.78
  4. Step 4: Simplify right side
    8,171.25x = 39,734,911.91
  5. Step 5: Solve for x
    x = 39,734,911.91/8,171.25
  6. Step 6: Final answer
    x = 4,862.77

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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.