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Finding the Fourth Proportional to 19,140.62, 28,704.57 and 8,045.24

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Solution

The fourth proportional to 19,140.62, 28,704.57 and 8,045.24 is: 12,065.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,140.62 : 28,704.57 = 8,045.24 : x
  2. Step 2: Convert to fraction form
    19,140.62/28,704.57 = 8,045.24/x
  3. Step 3: Cross multiply
    19,140.62x = 28,704.57 × 8,045.24
  4. Step 4: Simplify right side
    19,140.62x = 230,935,011.22
  5. Step 5: Solve for x
    x = 230,935,011.22/19,140.62
  6. Step 6: Final answer
    x = 12,065.18

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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.