Home / 20,120.58-30,183.21-7,650

Finding the Fourth Proportional to 20,120.58, 30,183.21 and 7,650

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Solution

The fourth proportional to 20,120.58, 30,183.21 and 7,650 is: 11,475.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.58 : 30,183.21 = 7,650 : x
  2. Step 2: Convert to fraction form
    20,120.58/30,183.21 = 7,650/x
  3. Step 3: Cross multiply
    20,120.58x = 30,183.21 × 7,650
  4. Step 4: Simplify right side
    20,120.58x = 230,901,556.50
  5. Step 5: Solve for x
    x = 230,901,556.50/20,120.58
  6. Step 6: Final answer
    x = 11,475.89

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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.