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Finding the Fourth Proportional to 7,321.09, 10,103.10 and 3,963.93

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Solution

The fourth proportional to 7,321.09, 10,103.10 and 3,963.93 is: 5,470.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.09 : 10,103.10 = 3,963.93 : x
  2. Step 2: Convert to fraction form
    7,321.09/10,103.10 = 3,963.93/x
  3. Step 3: Cross multiply
    7,321.09x = 10,103.10 × 3,963.93
  4. Step 4: Simplify right side
    7,321.09x = 40,047,981.18
  5. Step 5: Solve for x
    x = 40,047,981.18/7,321.09
  6. Step 6: Final answer
    x = 5,470.22

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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.