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Finding the Fourth Proportional to 18,495.36, 27,665.28 and 15,929.28

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Solution

The fourth proportional to 18,495.36, 27,665.28 and 15,929.28 is: 23,826.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,495.36 : 27,665.28 = 15,929.28 : x
  2. Step 2: Convert to fraction form
    18,495.36/27,665.28 = 15,929.28/x
  3. Step 3: Cross multiply
    18,495.36x = 27,665.28 × 15,929.28
  4. Step 4: Simplify right side
    18,495.36x = 440,687,991.40
  5. Step 5: Solve for x
    x = 440,687,991.40/18,495.36
  6. Step 6: Final answer
    x = 23,826.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.