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Finding the Fourth Proportional to 12,200.67, 18,279.99 and 8,243.19

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Solution

The fourth proportional to 12,200.67, 18,279.99 and 8,243.19 is: 12,350.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,200.67 : 18,279.99 = 8,243.19 : x
  2. Step 2: Convert to fraction form
    12,200.67/18,279.99 = 8,243.19/x
  3. Step 3: Cross multiply
    12,200.67x = 18,279.99 × 8,243.19
  4. Step 4: Simplify right side
    12,200.67x = 150,685,430.77
  5. Step 5: Solve for x
    x = 150,685,430.77/12,200.67
  6. Step 6: Final answer
    x = 12,350.59

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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.