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Finding the Fourth Proportional to 6,641.85, 9,963.04 and 1,961.86

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Solution

The fourth proportional to 6,641.85, 9,963.04 and 1,961.86 is: 2,942.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,641.85 : 9,963.04 = 1,961.86 : x
  2. Step 2: Convert to fraction form
    6,641.85/9,963.04 = 1,961.86/x
  3. Step 3: Cross multiply
    6,641.85x = 9,963.04 × 1,961.86
  4. Step 4: Simplify right side
    6,641.85x = 19,546,089.65
  5. Step 5: Solve for x
    x = 19,546,089.65/6,641.85
  6. Step 6: Final answer
    x = 2,942.87

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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.