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Finding the Fourth Proportional to 19,034.55, 28,558.23 and 9,172.71

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Solution

The fourth proportional to 19,034.55, 28,558.23 and 9,172.71 is: 13,762.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,034.55 : 28,558.23 = 9,172.71 : x
  2. Step 2: Convert to fraction form
    19,034.55/28,558.23 = 9,172.71/x
  3. Step 3: Cross multiply
    19,034.55x = 28,558.23 × 9,172.71
  4. Step 4: Simplify right side
    19,034.55x = 261,956,361.90
  5. Step 5: Solve for x
    x = 261,956,361.90/19,034.55
  6. Step 6: Final answer
    x = 13,762.15

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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.