Home / 3,855.25-5,320.26-2,086.86

Finding the Fourth Proportional to 3,855.25, 5,320.26 and 2,086.86

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Solution

The fourth proportional to 3,855.25, 5,320.26 and 2,086.86 is: 2,879.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.25 : 5,320.26 = 2,086.86 : x
  2. Step 2: Convert to fraction form
    3,855.25/5,320.26 = 2,086.86/x
  3. Step 3: Cross multiply
    3,855.25x = 5,320.26 × 2,086.86
  4. Step 4: Simplify right side
    3,855.25x = 11,102,637.78
  5. Step 5: Solve for x
    x = 11,102,637.78/3,855.25
  6. Step 6: Final answer
    x = 2,879.87

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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.