Home / 20,143.56-30,189.78-11,383.38

Finding the Fourth Proportional to 20,143.56, 30,189.78 and 11,383.38

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Solution

The fourth proportional to 20,143.56, 30,189.78 and 11,383.38 is: 17,060.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.56 : 30,189.78 = 11,383.38 : x
  2. Step 2: Convert to fraction form
    20,143.56/30,189.78 = 11,383.38/x
  3. Step 3: Cross multiply
    20,143.56x = 30,189.78 × 11,383.38
  4. Step 4: Simplify right side
    20,143.56x = 343,661,737.86
  5. Step 5: Solve for x
    x = 343,661,737.86/20,143.56
  6. Step 6: Final answer
    x = 17,060.63

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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.