Home / 3,874.12-5,809.77-2,120.42

Finding the Fourth Proportional to 3,874.12, 5,809.77 and 2,120.42

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Solution

The fourth proportional to 3,874.12, 5,809.77 and 2,120.42 is: 3,179.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,874.12 : 5,809.77 = 2,120.42 : x
  2. Step 2: Convert to fraction form
    3,874.12/5,809.77 = 2,120.42/x
  3. Step 3: Cross multiply
    3,874.12x = 5,809.77 × 2,120.42
  4. Step 4: Simplify right side
    3,874.12x = 12,319,123.45
  5. Step 5: Solve for x
    x = 12,319,123.45/3,874.12
  6. Step 6: Final answer
    x = 3,179.85

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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.