Home / 20,912.96-31,367.90-6,872.82

Finding the Fourth Proportional to 20,912.96, 31,367.90 and 6,872.82

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Solution

The fourth proportional to 20,912.96, 31,367.90 and 6,872.82 is: 10,308.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.96 : 31,367.90 = 6,872.82 : x
  2. Step 2: Convert to fraction form
    20,912.96/31,367.90 = 6,872.82/x
  3. Step 3: Cross multiply
    20,912.96x = 31,367.90 × 6,872.82
  4. Step 4: Simplify right side
    20,912.96x = 215,585,896.11
  5. Step 5: Solve for x
    x = 215,585,896.11/20,912.96
  6. Step 6: Final answer
    x = 10,308.72

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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.