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Finding the Fourth Proportional to 6,641.76, 9,163.42 and 3,845.28

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Solution

The fourth proportional to 6,641.76, 9,163.42 and 3,845.28 is: 5,305.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,641.76 : 9,163.42 = 3,845.28 : x
  2. Step 2: Convert to fraction form
    6,641.76/9,163.42 = 3,845.28/x
  3. Step 3: Cross multiply
    6,641.76x = 9,163.42 × 3,845.28
  4. Step 4: Simplify right side
    6,641.76x = 35,235,915.66
  5. Step 5: Solve for x
    x = 35,235,915.66/6,641.76
  6. Step 6: Final answer
    x = 5,305.21

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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.