Home / 8,121.79-12,183.15-2,278.85

Finding the Fourth Proportional to 8,121.79, 12,183.15 and 2,278.85

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Solution

The fourth proportional to 8,121.79, 12,183.15 and 2,278.85 is: 3,418.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.79 : 12,183.15 = 2,278.85 : x
  2. Step 2: Convert to fraction form
    8,121.79/12,183.15 = 2,278.85/x
  3. Step 3: Cross multiply
    8,121.79x = 12,183.15 × 2,278.85
  4. Step 4: Simplify right side
    8,121.79x = 27,763,571.38
  5. Step 5: Solve for x
    x = 27,763,571.38/8,121.79
  6. Step 6: Final answer
    x = 3,418.41

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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.