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Finding the Fourth Proportional to 7,321.10, 10,103.13 and 3,963.95

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Solution

The fourth proportional to 7,321.10, 10,103.13 and 3,963.95 is: 5,470.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.10 : 10,103.13 = 3,963.95 : x
  2. Step 2: Convert to fraction form
    7,321.10/10,103.13 = 3,963.95/x
  3. Step 3: Cross multiply
    7,321.10x = 10,103.13 × 3,963.95
  4. Step 4: Simplify right side
    7,321.10x = 40,048,231.83
  5. Step 5: Solve for x
    x = 40,048,231.83/7,321.10
  6. Step 6: Final answer
    x = 5,470.25

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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.