Home / 20,115.70-30,147.52-11,230.80

Finding the Fourth Proportional to 20,115.70, 30,147.52 and 11,230.80

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Solution

The fourth proportional to 20,115.70, 30,147.52 and 11,230.80 is: 16,831.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.70 : 30,147.52 = 11,230.80 : x
  2. Step 2: Convert to fraction form
    20,115.70/30,147.52 = 11,230.80/x
  3. Step 3: Cross multiply
    20,115.70x = 30,147.52 × 11,230.80
  4. Step 4: Simplify right side
    20,115.70x = 338,580,767.62
  5. Step 5: Solve for x
    x = 338,580,767.62/20,115.70
  6. Step 6: Final answer
    x = 16,831.67

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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.