Home / 13,481.12-20,221.73-4,121.11

Finding the Fourth Proportional to 13,481.12, 20,221.73 and 4,121.11

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Solution

The fourth proportional to 13,481.12, 20,221.73 and 4,121.11 is: 6,181.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,481.12 : 20,221.73 = 4,121.11 : x
  2. Step 2: Convert to fraction form
    13,481.12/20,221.73 = 4,121.11/x
  3. Step 3: Cross multiply
    13,481.12x = 20,221.73 × 4,121.11
  4. Step 4: Simplify right side
    13,481.12x = 83,335,933.47
  5. Step 5: Solve for x
    x = 83,335,933.47/13,481.12
  6. Step 6: Final answer
    x = 6,181.68

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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.