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Finding the Fourth Proportional to 18,771.72, 25,905.12 and 10,274.04

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Solution

The fourth proportional to 18,771.72, 25,905.12 and 10,274.04 is: 14,178.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771.72 : 25,905.12 = 10,274.04 : x
  2. Step 2: Convert to fraction form
    18,771.72/25,905.12 = 10,274.04/x
  3. Step 3: Cross multiply
    18,771.72x = 25,905.12 × 10,274.04
  4. Step 4: Simplify right side
    18,771.72x = 266,150,239.08
  5. Step 5: Solve for x
    x = 266,150,239.08/18,771.72
  6. Step 6: Final answer
    x = 14,178.26

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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.