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Finding the Fourth Proportional to 14,351.60, 19,805.49 and 7,978.73

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Solution

The fourth proportional to 14,351.60, 19,805.49 and 7,978.73 is: 11,010.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,351.60 : 19,805.49 = 7,978.73 : x
  2. Step 2: Convert to fraction form
    14,351.60/19,805.49 = 7,978.73/x
  3. Step 3: Cross multiply
    14,351.60x = 19,805.49 × 7,978.73
  4. Step 4: Simplify right side
    14,351.60x = 158,022,558.20
  5. Step 5: Solve for x
    x = 158,022,558.20/14,351.60
  6. Step 6: Final answer
    x = 11,010.80

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.