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Finding the Fourth Proportional to 18,622.92, 27,909.60 and 13,669.32

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Solution

The fourth proportional to 18,622.92, 27,909.60 and 13,669.32 is: 20,485.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,622.92 : 27,909.60 = 13,669.32 : x
  2. Step 2: Convert to fraction form
    18,622.92/27,909.60 = 13,669.32/x
  3. Step 3: Cross multiply
    18,622.92x = 27,909.60 × 13,669.32
  4. Step 4: Simplify right side
    18,622.92x = 381,505,253.47
  5. Step 5: Solve for x
    x = 381,505,253.47/18,622.92
  6. Step 6: Final answer
    x = 20,485.79

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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.