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Finding the Fourth Proportional to 6,647.52, 9,171.44 and 3,993.92

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Solution

The fourth proportional to 6,647.52, 9,171.44 and 3,993.92 is: 5,510.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,647.52 : 9,171.44 = 3,993.92 : x
  2. Step 2: Convert to fraction form
    6,647.52/9,171.44 = 3,993.92/x
  3. Step 3: Cross multiply
    6,647.52x = 9,171.44 × 3,993.92
  4. Step 4: Simplify right side
    6,647.52x = 36,629,997.64
  5. Step 5: Solve for x
    x = 36,629,997.64/6,647.52
  6. Step 6: Final answer
    x = 5,510.33

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Double scale
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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.