Home / 31,450.82-43,420.11-20,854.85

Finding the Fourth Proportional to 31,450.82, 43,420.11 and 20,854.85

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Solution

The fourth proportional to 31,450.82, 43,420.11 and 20,854.85 is: 28,791.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,450.82 : 43,420.11 = 20,854.85 : x
  2. Step 2: Convert to fraction form
    31,450.82/43,420.11 = 20,854.85/x
  3. Step 3: Cross multiply
    31,450.82x = 43,420.11 × 20,854.85
  4. Step 4: Simplify right side
    31,450.82x = 905,519,881.03
  5. Step 5: Solve for x
    x = 905,519,881.03/31,450.82
  6. Step 6: Final answer
    x = 28,791.61

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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.