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Finding the Fourth Proportional to 7,321.13, 10,103.19 and 3,963.99

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Solution

The fourth proportional to 7,321.13, 10,103.19 and 3,963.99 is: 5,470.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.13 : 10,103.19 = 3,963.99 : x
  2. Step 2: Convert to fraction form
    7,321.13/10,103.19 = 3,963.99/x
  3. Step 3: Cross multiply
    7,321.13x = 10,103.19 × 3,963.99
  4. Step 4: Simplify right side
    7,321.13x = 40,048,944.13
  5. Step 5: Solve for x
    x = 40,048,944.13/7,321.13
  6. Step 6: Final answer
    x = 5,470.33

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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.