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Finding the Fourth Proportional to 8,080.50, 12,120.75 and 2,608.50

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Solution

The fourth proportional to 8,080.50, 12,120.75 and 2,608.50 is: 3,912.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,080.50 : 12,120.75 = 2,608.50 : x
  2. Step 2: Convert to fraction form
    8,080.50/12,120.75 = 2,608.50/x
  3. Step 3: Cross multiply
    8,080.50x = 12,120.75 × 2,608.50
  4. Step 4: Simplify right side
    8,080.50x = 31,616,976.38
  5. Step 5: Solve for x
    x = 31,616,976.38/8,080.50
  6. Step 6: Final answer
    x = 3,912.75

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Double scale
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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.