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Finding the Fourth Proportional to 18,805.86, 28,211.22 and 6,320.52

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Solution

The fourth proportional to 18,805.86, 28,211.22 and 6,320.52 is: 9,481.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805.86 : 28,211.22 = 6,320.52 : x
  2. Step 2: Convert to fraction form
    18,805.86/28,211.22 = 6,320.52/x
  3. Step 3: Cross multiply
    18,805.86x = 28,211.22 × 6,320.52
  4. Step 4: Simplify right side
    18,805.86x = 178,309,580.23
  5. Step 5: Solve for x
    x = 178,309,580.23/18,805.86
  6. Step 6: Final answer
    x = 9,481.60

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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.