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Finding the Fourth Proportional to 13,348.37, 18,420 and 7,379.69

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Solution

The fourth proportional to 13,348.37, 18,420 and 7,379.69 is: 10,183.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,348.37 : 18,420 = 7,379.69 : x
  2. Step 2: Convert to fraction form
    13,348.37/18,420 = 7,379.69/x
  3. Step 3: Cross multiply
    13,348.37x = 18,420 × 7,379.69
  4. Step 4: Simplify right side
    13,348.37x = 135,933,797.70
  5. Step 5: Solve for x
    x = 135,933,797.70/13,348.37
  6. Step 6: Final answer
    x = 10,183.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.