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Finding the Fourth Proportional to 18,704.96, 28,060.80 and 8,316.80

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Solution

The fourth proportional to 18,704.96, 28,060.80 and 8,316.80 is: 12,476.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704.96 : 28,060.80 = 8,316.80 : x
  2. Step 2: Convert to fraction form
    18,704.96/28,060.80 = 8,316.80/x
  3. Step 3: Cross multiply
    18,704.96x = 28,060.80 × 8,316.80
  4. Step 4: Simplify right side
    18,704.96x = 233,376,061.44
  5. Step 5: Solve for x
    x = 233,376,061.44/18,704.96
  6. Step 6: Final answer
    x = 12,476.69

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.