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Finding the Fourth Proportional to 20,617.82, 30,926.72 and 11,847.14

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Solution

The fourth proportional to 20,617.82, 30,926.72 and 11,847.14 is: 17,770.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.82 : 30,926.72 = 11,847.14 : x
  2. Step 2: Convert to fraction form
    20,617.82/30,926.72 = 11,847.14/x
  3. Step 3: Cross multiply
    20,617.82x = 30,926.72 × 11,847.14
  4. Step 4: Simplify right side
    20,617.82x = 366,393,056.57
  5. Step 5: Solve for x
    x = 366,393,056.57/20,617.82
  6. Step 6: Final answer
    x = 17,770.70

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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.