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Finding the Fourth Proportional to 8,119.89, 12,179.82 and 1,963.89

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Solution

The fourth proportional to 8,119.89, 12,179.82 and 1,963.89 is: 2,945.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,119.89 : 12,179.82 = 1,963.89 : x
  2. Step 2: Convert to fraction form
    8,119.89/12,179.82 = 1,963.89/x
  3. Step 3: Cross multiply
    8,119.89x = 12,179.82 × 1,963.89
  4. Step 4: Simplify right side
    8,119.89x = 23,919,826.70
  5. Step 5: Solve for x
    x = 23,919,826.70/8,119.89
  6. Step 6: Final answer
    x = 2,945.83

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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.