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Finding the Fourth Proportional to 6,639.45, 9,965.32 and 3,354.85

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Solution

The fourth proportional to 6,639.45, 9,965.32 and 3,354.85 is: 5,035.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.45 : 9,965.32 = 3,354.85 : x
  2. Step 2: Convert to fraction form
    6,639.45/9,965.32 = 3,354.85/x
  3. Step 3: Cross multiply
    6,639.45x = 9,965.32 × 3,354.85
  4. Step 4: Simplify right side
    6,639.45x = 33,432,153.80
  5. Step 5: Solve for x
    x = 33,432,153.80/6,639.45
  6. Step 6: Final answer
    x = 5,035.38

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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.