Home / 20,945.55-31,422.21-6,906.56

Finding the Fourth Proportional to 20,945.55, 31,422.21 and 6,906.56

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Solution

The fourth proportional to 20,945.55, 31,422.21 and 6,906.56 is: 10,361.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.55 : 31,422.21 = 6,906.56 : x
  2. Step 2: Convert to fraction form
    20,945.55/31,422.21 = 6,906.56/x
  3. Step 3: Cross multiply
    20,945.55x = 31,422.21 × 6,906.56
  4. Step 4: Simplify right side
    20,945.55x = 217,019,221.59
  5. Step 5: Solve for x
    x = 217,019,221.59/20,945.55
  6. Step 6: Final answer
    x = 10,361.11

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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.