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Finding the Fourth Proportional to 19,218.44, 28,821.14 and 9,351.44

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Solution

The fourth proportional to 19,218.44, 28,821.14 and 9,351.44 is: 14,023.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,218.44 : 28,821.14 = 9,351.44 : x
  2. Step 2: Convert to fraction form
    19,218.44/28,821.14 = 9,351.44/x
  3. Step 3: Cross multiply
    19,218.44x = 28,821.14 × 9,351.44
  4. Step 4: Simplify right side
    19,218.44x = 269,519,161.44
  5. Step 5: Solve for x
    x = 269,519,161.44/19,218.44
  6. Step 6: Final answer
    x = 14,023.99

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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.