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Finding the Fourth Proportional to 16,922.20, 25,385.10 and 13,217.20

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Solution

The fourth proportional to 16,922.20, 25,385.10 and 13,217.20 is: 19,827.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,922.20 : 25,385.10 = 13,217.20 : x
  2. Step 2: Convert to fraction form
    16,922.20/25,385.10 = 13,217.20/x
  3. Step 3: Cross multiply
    16,922.20x = 25,385.10 × 13,217.20
  4. Step 4: Simplify right side
    16,922.20x = 335,519,943.72
  5. Step 5: Solve for x
    x = 335,519,943.72/16,922.20
  6. Step 6: Final answer
    x = 19,827.21

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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.