Home / 20,122.20-30,183.30-12,759.30

Finding the Fourth Proportional to 20,122.20, 30,183.30 and 12,759.30

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Solution

The fourth proportional to 20,122.20, 30,183.30 and 12,759.30 is: 19,138.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,122.20 : 30,183.30 = 12,759.30 : x
  2. Step 2: Convert to fraction form
    20,122.20/30,183.30 = 12,759.30/x
  3. Step 3: Cross multiply
    20,122.20x = 30,183.30 × 12,759.30
  4. Step 4: Simplify right side
    20,122.20x = 385,117,779.69
  5. Step 5: Solve for x
    x = 385,117,779.69/20,122.20
  6. Step 6: Final answer
    x = 19,138.95

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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.