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Finding the Fourth Proportional to 28,194.40, 38,868.78 and 19,684.36

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Solution

The fourth proportional to 28,194.40, 38,868.78 and 19,684.36 is: 27,136.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,194.40 : 38,868.78 = 19,684.36 : x
  2. Step 2: Convert to fraction form
    28,194.40/38,868.78 = 19,684.36/x
  3. Step 3: Cross multiply
    28,194.40x = 38,868.78 × 19,684.36
  4. Step 4: Simplify right side
    28,194.40x = 765,107,058.28
  5. Step 5: Solve for x
    x = 765,107,058.28/28,194.40
  6. Step 6: Final answer
    x = 27,136.84

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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.