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Finding the Fourth Proportional to 7,891.92, 11,839.50 and 2,961.54

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Solution

The fourth proportional to 7,891.92, 11,839.50 and 2,961.54 is: 4,442.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.92 : 11,839.50 = 2,961.54 : x
  2. Step 2: Convert to fraction form
    7,891.92/11,839.50 = 2,961.54/x
  3. Step 3: Cross multiply
    7,891.92x = 11,839.50 × 2,961.54
  4. Step 4: Simplify right side
    7,891.92x = 35,063,152.83
  5. Step 5: Solve for x
    x = 35,063,152.83/7,891.92
  6. Step 6: Final answer
    x = 4,442.92

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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.