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Finding the Fourth Proportional to 18,774, 28,150.07 and 8,243.60

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Solution

The fourth proportional to 18,774, 28,150.07 and 8,243.60 is: 12,360.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774 : 28,150.07 = 8,243.60 : x
  2. Step 2: Convert to fraction form
    18,774/28,150.07 = 8,243.60/x
  3. Step 3: Cross multiply
    18,774x = 28,150.07 × 8,243.60
  4. Step 4: Simplify right side
    18,774x = 232,057,735.08
  5. Step 5: Solve for x
    x = 232,057,735.08/18,774
  6. Step 6: Final answer
    x = 12,360.59

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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.