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Finding the Fourth Proportional to 20,792.97, 28,694.25 and 11,361.60

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Solution

The fourth proportional to 20,792.97, 28,694.25 and 11,361.60 is: 15,678.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.97 : 28,694.25 = 11,361.60 : x
  2. Step 2: Convert to fraction form
    20,792.97/28,694.25 = 11,361.60/x
  3. Step 3: Cross multiply
    20,792.97x = 28,694.25 × 11,361.60
  4. Step 4: Simplify right side
    20,792.97x = 326,012,590.80
  5. Step 5: Solve for x
    x = 326,012,590.80/20,792.97
  6. Step 6: Final answer
    x = 15,678.98

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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.