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Finding the Fourth Proportional to 5,261.96, 7,891.86 and 1,974.92

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Solution

The fourth proportional to 5,261.96, 7,891.86 and 1,974.92 is: 2,961.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,261.96 : 7,891.86 = 1,974.92 : x
  2. Step 2: Convert to fraction form
    5,261.96/7,891.86 = 1,974.92/x
  3. Step 3: Cross multiply
    5,261.96x = 7,891.86 × 1,974.92
  4. Step 4: Simplify right side
    5,261.96x = 15,585,792.15
  5. Step 5: Solve for x
    x = 15,585,792.15/5,261.96
  6. Step 6: Final answer
    x = 2,961.97

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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.