Home / 20,178.36-30,229.38-11,419.56

Finding the Fourth Proportional to 20,178.36, 30,229.38 and 11,419.56

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Solution

The fourth proportional to 20,178.36, 30,229.38 and 11,419.56 is: 17,107.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,178.36 : 30,229.38 = 11,419.56 : x
  2. Step 2: Convert to fraction form
    20,178.36/30,229.38 = 11,419.56/x
  3. Step 3: Cross multiply
    20,178.36x = 30,229.38 × 11,419.56
  4. Step 4: Simplify right side
    20,178.36x = 345,206,218.67
  5. Step 5: Solve for x
    x = 345,206,218.67/20,178.36
  6. Step 6: Final answer
    x = 17,107.74

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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.