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Finding the Fourth Proportional to 8,081.50, 12,122.25 and 2,609.50

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Solution

The fourth proportional to 8,081.50, 12,122.25 and 2,609.50 is: 3,914.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,081.50 : 12,122.25 = 2,609.50 : x
  2. Step 2: Convert to fraction form
    8,081.50/12,122.25 = 2,609.50/x
  3. Step 3: Cross multiply
    8,081.50x = 12,122.25 × 2,609.50
  4. Step 4: Simplify right side
    8,081.50x = 31,633,011.38
  5. Step 5: Solve for x
    x = 31,633,011.38/8,081.50
  6. Step 6: Final answer
    x = 3,914.25

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Double scale
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Similar ratio
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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.