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Finding the Fourth Proportional to 22,940.40, 34,367.40 and 11,809.20

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Solution

The fourth proportional to 22,940.40, 34,367.40 and 11,809.20 is: 17,691.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,940.40 : 34,367.40 = 11,809.20 : x
  2. Step 2: Convert to fraction form
    22,940.40/34,367.40 = 11,809.20/x
  3. Step 3: Cross multiply
    22,940.40x = 34,367.40 × 11,809.20
  4. Step 4: Simplify right side
    22,940.40x = 405,851,500.08
  5. Step 5: Solve for x
    x = 405,851,500.08/22,940.40
  6. Step 6: Final answer
    x = 17,691.56

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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.