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Finding the Fourth Proportional to 18,680.94, 25,702.41 and 14,178.45

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Solution

The fourth proportional to 18,680.94, 25,702.41 and 14,178.45 is: 19,507.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,680.94 : 25,702.41 = 14,178.45 : x
  2. Step 2: Convert to fraction form
    18,680.94/25,702.41 = 14,178.45/x
  3. Step 3: Cross multiply
    18,680.94x = 25,702.41 × 14,178.45
  4. Step 4: Simplify right side
    18,680.94x = 364,420,335.06
  5. Step 5: Solve for x
    x = 364,420,335.06/18,680.94
  6. Step 6: Final answer
    x = 19,507.60

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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.