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Finding the Fourth Proportional to 14,991.50, 20,687.73 and 8,185.40

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Solution

The fourth proportional to 14,991.50, 20,687.73 and 8,185.40 is: 11,295.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,991.50 : 20,687.73 = 8,185.40 : x
  2. Step 2: Convert to fraction form
    14,991.50/20,687.73 = 8,185.40/x
  3. Step 3: Cross multiply
    14,991.50x = 20,687.73 × 8,185.40
  4. Step 4: Simplify right side
    14,991.50x = 169,337,241.70
  5. Step 5: Solve for x
    x = 169,337,241.70/14,991.50
  6. Step 6: Final answer
    x = 11,295.55

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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.