Home / 3,786.20-5,679.30-2,145.95

Finding the Fourth Proportional to 3,786.20, 5,679.30 and 2,145.95

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Solution

The fourth proportional to 3,786.20, 5,679.30 and 2,145.95 is: 3,218.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,786.20 : 5,679.30 = 2,145.95 : x
  2. Step 2: Convert to fraction form
    3,786.20/5,679.30 = 2,145.95/x
  3. Step 3: Cross multiply
    3,786.20x = 5,679.30 × 2,145.95
  4. Step 4: Simplify right side
    3,786.20x = 12,187,493.84
  5. Step 5: Solve for x
    x = 12,187,493.84/3,786.20
  6. Step 6: Final answer
    x = 3,218.93

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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.