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Finding the Fourth Proportional to 18,906.92, 28,362.32 and 7,229.96

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Solution

The fourth proportional to 18,906.92, 28,362.32 and 7,229.96 is: 10,845.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,906.92 : 28,362.32 = 7,229.96 : x
  2. Step 2: Convert to fraction form
    18,906.92/28,362.32 = 7,229.96/x
  3. Step 3: Cross multiply
    18,906.92x = 28,362.32 × 7,229.96
  4. Step 4: Simplify right side
    18,906.92x = 205,058,439.11
  5. Step 5: Solve for x
    x = 205,058,439.11/18,906.92
  6. Step 6: Final answer
    x = 10,845.68

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1.5x scale

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.