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Finding the Fourth Proportional to 6,641.20, 9,963.11 and 1,961.29

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Solution

The fourth proportional to 6,641.20, 9,963.11 and 1,961.29 is: 2,942.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,641.20 : 9,963.11 = 1,961.29 : x
  2. Step 2: Convert to fraction form
    6,641.20/9,963.11 = 1,961.29/x
  3. Step 3: Cross multiply
    6,641.20x = 9,963.11 × 1,961.29
  4. Step 4: Simplify right side
    6,641.20x = 19,540,488.39
  5. Step 5: Solve for x
    x = 19,540,488.39/6,641.20
  6. Step 6: Final answer
    x = 2,942.32

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Similar ratio
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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.