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Finding the Fourth Proportional to 18,212.80, 25,134.60 and 11,137

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Solution

The fourth proportional to 18,212.80, 25,134.60 and 11,137 is: 15,369.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,212.80 : 25,134.60 = 11,137 : x
  2. Step 2: Convert to fraction form
    18,212.80/25,134.60 = 11,137/x
  3. Step 3: Cross multiply
    18,212.80x = 25,134.60 × 11,137
  4. Step 4: Simplify right side
    18,212.80x = 279,924,040.20
  5. Step 5: Solve for x
    x = 279,924,040.20/18,212.80
  6. Step 6: Final answer
    x = 15,369.63

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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.