Home / 20,321.12-30,481.68-7,166.36

Finding the Fourth Proportional to 20,321.12, 30,481.68 and 7,166.36

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Solution

The fourth proportional to 20,321.12, 30,481.68 and 7,166.36 is: 10,749.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,321.12 : 30,481.68 = 7,166.36 : x
  2. Step 2: Convert to fraction form
    20,321.12/30,481.68 = 7,166.36/x
  3. Step 3: Cross multiply
    20,321.12x = 30,481.68 × 7,166.36
  4. Step 4: Simplify right side
    20,321.12x = 218,442,692.28
  5. Step 5: Solve for x
    x = 218,442,692.28/20,321.12
  6. Step 6: Final answer
    x = 10,749.54

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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.