Home / 3,855.16-5,320.11-2,086.76

Finding the Fourth Proportional to 3,855.16, 5,320.11 and 2,086.76

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Solution

The fourth proportional to 3,855.16, 5,320.11 and 2,086.76 is: 2,879.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.16 : 5,320.11 = 2,086.76 : x
  2. Step 2: Convert to fraction form
    3,855.16/5,320.11 = 2,086.76/x
  3. Step 3: Cross multiply
    3,855.16x = 5,320.11 × 2,086.76
  4. Step 4: Simplify right side
    3,855.16x = 11,101,813.87
  5. Step 5: Solve for x
    x = 11,101,813.87/3,855.16
  6. Step 6: Final answer
    x = 2,879.73

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1.5x scale

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.