Home / 20,168.91-30,190.19-12,747.69

Finding the Fourth Proportional to 20,168.91, 30,190.19 and 12,747.69

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Solution

The fourth proportional to 20,168.91, 30,190.19 and 12,747.69 is: 19,081.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,168.91 : 30,190.19 = 12,747.69 : x
  2. Step 2: Convert to fraction form
    20,168.91/30,190.19 = 12,747.69/x
  3. Step 3: Cross multiply
    20,168.91x = 30,190.19 × 12,747.69
  4. Step 4: Simplify right side
    20,168.91x = 384,855,119.42
  5. Step 5: Solve for x
    x = 384,855,119.42/20,168.91
  6. Step 6: Final answer
    x = 19,081.60

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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.