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Finding the Fourth Proportional to 3,896.91, 5,372.55 and 3,002.07

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Solution

The fourth proportional to 3,896.91, 5,372.55 and 3,002.07 is: 4,138.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,896.91 : 5,372.55 = 3,002.07 : x
  2. Step 2: Convert to fraction form
    3,896.91/5,372.55 = 3,002.07/x
  3. Step 3: Cross multiply
    3,896.91x = 5,372.55 × 3,002.07
  4. Step 4: Simplify right side
    3,896.91x = 16,128,771.18
  5. Step 5: Solve for x
    x = 16,128,771.18/3,896.91
  6. Step 6: Final answer
    x = 4,138.86

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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.