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Finding the Fourth Proportional to 15,210.48, 20,990.49 and 8,496.09

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Solution

The fourth proportional to 15,210.48, 20,990.49 and 8,496.09 is: 11,724.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,210.48 : 20,990.49 = 8,496.09 : x
  2. Step 2: Convert to fraction form
    15,210.48/20,990.49 = 8,496.09/x
  3. Step 3: Cross multiply
    15,210.48x = 20,990.49 × 8,496.09
  4. Step 4: Simplify right side
    15,210.48x = 178,337,092.18
  5. Step 5: Solve for x
    x = 178,337,092.18/15,210.48
  6. Step 6: Final answer
    x = 11,724.62

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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.