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Finding the Fourth Proportional to 18,661.56, 25,717.17 and 11,935.47

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Solution

The fourth proportional to 18,661.56, 25,717.17 and 11,935.47 is: 16,448.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.56 : 25,717.17 = 11,935.47 : x
  2. Step 2: Convert to fraction form
    18,661.56/25,717.17 = 11,935.47/x
  3. Step 3: Cross multiply
    18,661.56x = 25,717.17 × 11,935.47
  4. Step 4: Simplify right side
    18,661.56x = 306,946,511.02
  5. Step 5: Solve for x
    x = 306,946,511.02/18,661.56
  6. Step 6: Final answer
    x = 16,448.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.