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Finding the Fourth Proportional to 6,640.60, 9,961.63 and 2,196.65

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Solution

The fourth proportional to 6,640.60, 9,961.63 and 2,196.65 is: 3,295.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.60 : 9,961.63 = 2,196.65 : x
  2. Step 2: Convert to fraction form
    6,640.60/9,961.63 = 2,196.65/x
  3. Step 3: Cross multiply
    6,640.60x = 9,961.63 × 2,196.65
  4. Step 4: Simplify right side
    6,640.60x = 21,882,153.75
  5. Step 5: Solve for x
    x = 21,882,153.75/6,640.60
  6. Step 6: Final answer
    x = 3,295.21

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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.