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Finding the Fourth Proportional to 7,833.92, 11,751.42 and 2,640.20

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Solution

The fourth proportional to 7,833.92, 11,751.42 and 2,640.20 is: 3,960.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,833.92 : 11,751.42 = 2,640.20 : x
  2. Step 2: Convert to fraction form
    7,833.92/11,751.42 = 2,640.20/x
  3. Step 3: Cross multiply
    7,833.92x = 11,751.42 × 2,640.20
  4. Step 4: Simplify right side
    7,833.92x = 31,026,099.08
  5. Step 5: Solve for x
    x = 31,026,099.08/7,833.92
  6. Step 6: Final answer
    x = 3,960.48

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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.