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Finding the Fourth Proportional to 18,608.62, 27,912.86 and 7,515.18

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Solution

The fourth proportional to 18,608.62, 27,912.86 and 7,515.18 is: 11,272.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,608.62 : 27,912.86 = 7,515.18 : x
  2. Step 2: Convert to fraction form
    18,608.62/27,912.86 = 7,515.18/x
  3. Step 3: Cross multiply
    18,608.62x = 27,912.86 × 7,515.18
  4. Step 4: Simplify right side
    18,608.62x = 209,770,167.21
  5. Step 5: Solve for x
    x = 209,770,167.21/18,608.62
  6. Step 6: Final answer
    x = 11,272.74

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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.