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Finding the Fourth Proportional to 20,274.95, 27,992.25 and 13,912.17

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Solution

The fourth proportional to 20,274.95, 27,992.25 and 13,912.17 is: 19,207.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,274.95 : 27,992.25 = 13,912.17 : x
  2. Step 2: Convert to fraction form
    20,274.95/27,992.25 = 13,912.17/x
  3. Step 3: Cross multiply
    20,274.95x = 27,992.25 × 13,912.17
  4. Step 4: Simplify right side
    20,274.95x = 389,432,940.68
  5. Step 5: Solve for x
    x = 389,432,940.68/20,274.95
  6. Step 6: Final answer
    x = 19,207.60

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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.