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Finding the Fourth Proportional to 18,906.44, 28,362.29 and 8,375.63

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Solution

The fourth proportional to 18,906.44, 28,362.29 and 8,375.63 is: 12,564.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,906.44 : 28,362.29 = 8,375.63 : x
  2. Step 2: Convert to fraction form
    18,906.44/28,362.29 = 8,375.63/x
  3. Step 3: Cross multiply
    18,906.44x = 28,362.29 × 8,375.63
  4. Step 4: Simplify right side
    18,906.44x = 237,551,863.30
  5. Step 5: Solve for x
    x = 237,551,863.30/18,906.44
  6. Step 6: Final answer
    x = 12,564.60

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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.