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Finding the Fourth Proportional to 3,909.94, 5,391.97 and 3,623.61

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Solution

The fourth proportional to 3,909.94, 5,391.97 and 3,623.61 is: 4,997.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.94 : 5,391.97 = 3,623.61 : x
  2. Step 2: Convert to fraction form
    3,909.94/5,391.97 = 3,623.61/x
  3. Step 3: Cross multiply
    3,909.94x = 5,391.97 × 3,623.61
  4. Step 4: Simplify right side
    3,909.94x = 19,538,396.41
  5. Step 5: Solve for x
    x = 19,538,396.41/3,909.94
  6. Step 6: Final answer
    x = 4,997.11

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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.