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Finding the Fourth Proportional to 33,163.80, 49,728.60 and 9,787.20

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Solution

The fourth proportional to 33,163.80, 49,728.60 and 9,787.20 is: 14,675.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,163.80 : 49,728.60 = 9,787.20 : x
  2. Step 2: Convert to fraction form
    33,163.80/49,728.60 = 9,787.20/x
  3. Step 3: Cross multiply
    33,163.80x = 49,728.60 × 9,787.20
  4. Step 4: Simplify right side
    33,163.80x = 486,703,753.92
  5. Step 5: Solve for x
    x = 486,703,753.92/33,163.80
  6. Step 6: Final answer
    x = 14,675.75

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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.