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Finding the Fourth Proportional to 18,866.22, 28,311.62 and 7,179.54

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Solution

The fourth proportional to 18,866.22, 28,311.62 and 7,179.54 is: 10,773.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.22 : 28,311.62 = 7,179.54 : x
  2. Step 2: Convert to fraction form
    18,866.22/28,311.62 = 7,179.54/x
  3. Step 3: Cross multiply
    18,866.22x = 28,311.62 × 7,179.54
  4. Step 4: Simplify right side
    18,866.22x = 203,264,372.36
  5. Step 5: Solve for x
    x = 203,264,372.36/18,866.22
  6. Step 6: Final answer
    x = 10,773.99

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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.