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Finding the Fourth Proportional to 7,149.96, 9,866.88 and 3,963.36

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Solution

The fourth proportional to 7,149.96, 9,866.88 and 3,963.36 is: 5,469.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,149.96 : 9,866.88 = 3,963.36 : x
  2. Step 2: Convert to fraction form
    7,149.96/9,866.88 = 3,963.36/x
  3. Step 3: Cross multiply
    7,149.96x = 9,866.88 × 3,963.36
  4. Step 4: Simplify right side
    7,149.96x = 39,105,997.52
  5. Step 5: Solve for x
    x = 39,105,997.52/7,149.96
  6. Step 6: Final answer
    x = 5,469.40

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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.