Home / 20,139.76-27,793.71-11,187.22

Finding the Fourth Proportional to 20,139.76, 27,793.71 and 11,187.22

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Solution

The fourth proportional to 20,139.76, 27,793.71 and 11,187.22 is: 15,438.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.76 : 27,793.71 = 11,187.22 : x
  2. Step 2: Convert to fraction form
    20,139.76/27,793.71 = 11,187.22/x
  3. Step 3: Cross multiply
    20,139.76x = 27,793.71 × 11,187.22
  4. Step 4: Simplify right side
    20,139.76x = 310,934,348.39
  5. Step 5: Solve for x
    x = 310,934,348.39/20,139.76
  6. Step 6: Final answer
    x = 15,438.83

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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.