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Finding the Fourth Proportional to 3,887.96, 5,392.85 and 3,747.85

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Solution

The fourth proportional to 3,887.96, 5,392.85 and 3,747.85 is: 5,198.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.96 : 5,392.85 = 3,747.85 : x
  2. Step 2: Convert to fraction form
    3,887.96/5,392.85 = 3,747.85/x
  3. Step 3: Cross multiply
    3,887.96x = 5,392.85 × 3,747.85
  4. Step 4: Simplify right side
    3,887.96x = 20,211,560.65
  5. Step 5: Solve for x
    x = 20,211,560.65/3,887.96
  6. Step 6: Final answer
    x = 5,198.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.