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Finding the Fourth Proportional to 7,209.62, 9,949.28 and 4,065.81

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Solution

The fourth proportional to 7,209.62, 9,949.28 and 4,065.81 is: 5,610.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,209.62 : 9,949.28 = 4,065.81 : x
  2. Step 2: Convert to fraction form
    7,209.62/9,949.28 = 4,065.81/x
  3. Step 3: Cross multiply
    7,209.62x = 9,949.28 × 4,065.81
  4. Step 4: Simplify right side
    7,209.62x = 40,451,857.24
  5. Step 5: Solve for x
    x = 40,451,857.24/7,209.62
  6. Step 6: Final answer
    x = 5,610.82

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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.