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Finding the Fourth Proportional to 8,571.77, 12,859.26 and 3,892.11

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Solution

The fourth proportional to 8,571.77, 12,859.26 and 3,892.11 is: 5,838.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,571.77 : 12,859.26 = 3,892.11 : x
  2. Step 2: Convert to fraction form
    8,571.77/12,859.26 = 3,892.11/x
  3. Step 3: Cross multiply
    8,571.77x = 12,859.26 × 3,892.11
  4. Step 4: Simplify right side
    8,571.77x = 50,049,654.44
  5. Step 5: Solve for x
    x = 50,049,654.44/8,571.77
  6. Step 6: Final answer
    x = 5,838.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.