Home / 20,139.03-30,183.03-11,378.88

Finding the Fourth Proportional to 20,139.03, 30,183.03 and 11,378.88

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Solution

The fourth proportional to 20,139.03, 30,183.03 and 11,378.88 is: 17,053.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.03 : 30,183.03 = 11,378.88 : x
  2. Step 2: Convert to fraction form
    20,139.03/30,183.03 = 11,378.88/x
  3. Step 3: Cross multiply
    20,139.03x = 30,183.03 × 11,378.88
  4. Step 4: Simplify right side
    20,139.03x = 343,449,076.41
  5. Step 5: Solve for x
    x = 343,449,076.41/20,139.03
  6. Step 6: Final answer
    x = 17,053.90

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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.