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Finding the Fourth Proportional to 7,107.75, 9,809.00 and 3,963.94

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Solution

The fourth proportional to 7,107.75, 9,809.00 and 3,963.94 is: 5,470.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,107.75 : 9,809.00 = 3,963.94 : x
  2. Step 2: Convert to fraction form
    7,107.75/9,809.00 = 3,963.94/x
  3. Step 3: Cross multiply
    7,107.75x = 9,809.00 × 3,963.94
  4. Step 4: Simplify right side
    7,107.75x = 38,882,257.98
  5. Step 5: Solve for x
    x = 38,882,257.98/7,107.75
  6. Step 6: Final answer
    x = 5,470.40

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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.