Home / 8,121.86-12,183.14-2,278.34

Finding the Fourth Proportional to 8,121.86, 12,183.14 and 2,278.34

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Solution

The fourth proportional to 8,121.86, 12,183.14 and 2,278.34 is: 3,417.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.86 : 12,183.14 = 2,278.34 : x
  2. Step 2: Convert to fraction form
    8,121.86/12,183.14 = 2,278.34/x
  3. Step 3: Cross multiply
    8,121.86x = 12,183.14 × 2,278.34
  4. Step 4: Simplify right side
    8,121.86x = 27,757,279.97
  5. Step 5: Solve for x
    x = 27,757,279.97/8,121.86
  6. Step 6: Final answer
    x = 3,417.60

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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.