Home / 20,111.13-30,163.26-5,321.55

Finding the Fourth Proportional to 20,111.13, 30,163.26 and 5,321.55

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Solution

The fourth proportional to 20,111.13, 30,163.26 and 5,321.55 is: 7,981.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.13 : 30,163.26 = 5,321.55 : x
  2. Step 2: Convert to fraction form
    20,111.13/30,163.26 = 5,321.55/x
  3. Step 3: Cross multiply
    20,111.13x = 30,163.26 × 5,321.55
  4. Step 4: Simplify right side
    20,111.13x = 160,515,296.25
  5. Step 5: Solve for x
    x = 160,515,296.25/20,111.13
  6. Step 6: Final answer
    x = 7,981.42

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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.