Home / 3,855.28-5,320.30-2,086.89

Finding the Fourth Proportional to 3,855.28, 5,320.30 and 2,086.89

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Solution

The fourth proportional to 3,855.28, 5,320.30 and 2,086.89 is: 2,879.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.28 : 5,320.30 = 2,086.89 : x
  2. Step 2: Convert to fraction form
    3,855.28/5,320.30 = 2,086.89/x
  3. Step 3: Cross multiply
    3,855.28x = 5,320.30 × 2,086.89
  4. Step 4: Simplify right side
    3,855.28x = 11,102,880.87
  5. Step 5: Solve for x
    x = 11,102,880.87/3,855.28
  6. Step 6: Final answer
    x = 2,879.92

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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.