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Finding the Fourth Proportional to 20,599.65, 30,881.26 and 8,906.49

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Solution

The fourth proportional to 20,599.65, 30,881.26 and 8,906.49 is: 13,351.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,599.65 : 30,881.26 = 8,906.49 : x
  2. Step 2: Convert to fraction form
    20,599.65/30,881.26 = 8,906.49/x
  3. Step 3: Cross multiply
    20,599.65x = 30,881.26 × 8,906.49
  4. Step 4: Simplify right side
    20,599.65x = 275,043,633.38
  5. Step 5: Solve for x
    x = 275,043,633.38/20,599.65
  6. Step 6: Final answer
    x = 13,351.86

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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.