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Finding the Fourth Proportional to 18,102.53, 27,137.09 and 12,558.49

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Solution

The fourth proportional to 18,102.53, 27,137.09 and 12,558.49 is: 18,826.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,102.53 : 27,137.09 = 12,558.49 : x
  2. Step 2: Convert to fraction form
    18,102.53/27,137.09 = 12,558.49/x
  3. Step 3: Cross multiply
    18,102.53x = 27,137.09 × 12,558.49
  4. Step 4: Simplify right side
    18,102.53x = 340,800,873.39
  5. Step 5: Solve for x
    x = 340,800,873.39/18,102.53
  6. Step 6: Final answer
    x = 18,826.15

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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.