Home / 7,481.40-11,218.15-3,319.60

Finding the Fourth Proportional to 7,481.40, 11,218.15 and 3,319.60

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Solution

The fourth proportional to 7,481.40, 11,218.15 and 3,319.60 is: 4,977.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,481.40 : 11,218.15 = 3,319.60 : x
  2. Step 2: Convert to fraction form
    7,481.40/11,218.15 = 3,319.60/x
  3. Step 3: Cross multiply
    7,481.40x = 11,218.15 × 3,319.60
  4. Step 4: Simplify right side
    7,481.40x = 37,239,770.74
  5. Step 5: Solve for x
    x = 37,239,770.74/7,481.40
  6. Step 6: Final answer
    x = 4,977.65

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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.