Home / 3,855.24-5,320.20-2,086.81

Finding the Fourth Proportional to 3,855.24, 5,320.20 and 2,086.81

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Solution

The fourth proportional to 3,855.24, 5,320.20 and 2,086.81 is: 2,879.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.24 : 5,320.20 = 2,086.81 : x
  2. Step 2: Convert to fraction form
    3,855.24/5,320.20 = 2,086.81/x
  3. Step 3: Cross multiply
    3,855.24x = 5,320.20 × 2,086.81
  4. Step 4: Simplify right side
    3,855.24x = 11,102,233.26
  5. Step 5: Solve for x
    x = 11,102,233.26/3,855.24
  6. Step 6: Final answer
    x = 2,879.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.