Home / 20,138.28-27,786.33-12,180.33

Finding the Fourth Proportional to 20,138.28, 27,786.33 and 12,180.33

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Solution

The fourth proportional to 20,138.28, 27,786.33 and 12,180.33 is: 16,806.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.28 : 27,786.33 = 12,180.33 : x
  2. Step 2: Convert to fraction form
    20,138.28/27,786.33 = 12,180.33/x
  3. Step 3: Cross multiply
    20,138.28x = 27,786.33 × 12,180.33
  4. Step 4: Simplify right side
    20,138.28x = 338,446,668.89
  5. Step 5: Solve for x
    x = 338,446,668.89/20,138.28
  6. Step 6: Final answer
    x = 16,806.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.