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Finding the Fourth Proportional to 6,638.78, 9,954.92 and 3,866.42

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Solution

The fourth proportional to 6,638.78, 9,954.92 and 3,866.42 is: 5,797.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.78 : 9,954.92 = 3,866.42 : x
  2. Step 2: Convert to fraction form
    6,638.78/9,954.92 = 3,866.42/x
  3. Step 3: Cross multiply
    6,638.78x = 9,954.92 × 3,866.42
  4. Step 4: Simplify right side
    6,638.78x = 38,489,832.68
  5. Step 5: Solve for x
    x = 38,489,832.68/6,638.78
  6. Step 6: Final answer
    x = 5,797.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.