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Finding the Fourth Proportional to 6,616.22, 9,129.70 and 3,963.56

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Solution

The fourth proportional to 6,616.22, 9,129.70 and 3,963.56 is: 5,469.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,616.22 : 9,129.70 = 3,963.56 : x
  2. Step 2: Convert to fraction form
    6,616.22/9,129.70 = 3,963.56/x
  3. Step 3: Cross multiply
    6,616.22x = 9,129.70 × 3,963.56
  4. Step 4: Simplify right side
    6,616.22x = 36,186,058.17
  5. Step 5: Solve for x
    x = 36,186,058.17/6,616.22
  6. Step 6: Final answer
    x = 5,469.30

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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.