Home / 20,183.70-30,275.55-12,820.80

Finding the Fourth Proportional to 20,183.70, 30,275.55 and 12,820.80

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Solution

The fourth proportional to 20,183.70, 30,275.55 and 12,820.80 is: 19,231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,183.70 : 30,275.55 = 12,820.80 : x
  2. Step 2: Convert to fraction form
    20,183.70/30,275.55 = 12,820.80/x
  3. Step 3: Cross multiply
    20,183.70x = 30,275.55 × 12,820.80
  4. Step 4: Simplify right side
    20,183.70x = 388,156,771.44
  5. Step 5: Solve for x
    x = 388,156,771.44/20,183.70
  6. Step 6: Final answer
    x = 19,231.20

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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.