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Finding the Fourth Proportional to 8,642.62, 12,963.85 and 3,961.30

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Solution

The fourth proportional to 8,642.62, 12,963.85 and 3,961.30 is: 5,941.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,642.62 : 12,963.85 = 3,961.30 : x
  2. Step 2: Convert to fraction form
    8,642.62/12,963.85 = 3,961.30/x
  3. Step 3: Cross multiply
    8,642.62x = 12,963.85 × 3,961.30
  4. Step 4: Simplify right side
    8,642.62x = 51,353,679.20
  5. Step 5: Solve for x
    x = 51,353,679.20/8,642.62
  6. Step 6: Final answer
    x = 5,941.91

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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.