Home / 8,121.61-12,183.57-2,575.43

Finding the Fourth Proportional to 8,121.61, 12,183.57 and 2,575.43

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Solution

The fourth proportional to 8,121.61, 12,183.57 and 2,575.43 is: 3,863.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.61 : 12,183.57 = 2,575.43 : x
  2. Step 2: Convert to fraction form
    8,121.61/12,183.57 = 2,575.43/x
  3. Step 3: Cross multiply
    8,121.61x = 12,183.57 × 2,575.43
  4. Step 4: Simplify right side
    8,121.61x = 31,377,962.14
  5. Step 5: Solve for x
    x = 31,377,962.14/8,121.61
  6. Step 6: Final answer
    x = 3,863.52

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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.