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Finding the Fourth Proportional to 18,693.89, 28,046.13 and 7,608.53

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Solution

The fourth proportional to 18,693.89, 28,046.13 and 7,608.53 is: 11,414.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.89 : 28,046.13 = 7,608.53 : x
  2. Step 2: Convert to fraction form
    18,693.89/28,046.13 = 7,608.53/x
  3. Step 3: Cross multiply
    18,693.89x = 28,046.13 × 7,608.53
  4. Step 4: Simplify right side
    18,693.89x = 213,389,905.87
  5. Step 5: Solve for x
    x = 213,389,905.87/18,693.89
  6. Step 6: Final answer
    x = 11,414.96

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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.