Home / 20,951.78-31,438.35-13,936.73

Finding the Fourth Proportional to 20,951.78, 31,438.35 and 13,936.73

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Solution

The fourth proportional to 20,951.78, 31,438.35 and 13,936.73 is: 20,912.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.78 : 31,438.35 = 13,936.73 : x
  2. Step 2: Convert to fraction form
    20,951.78/31,438.35 = 13,936.73/x
  3. Step 3: Cross multiply
    20,951.78x = 31,438.35 × 13,936.73
  4. Step 4: Simplify right side
    20,951.78x = 438,147,638.40
  5. Step 5: Solve for x
    x = 438,147,638.40/20,951.78
  6. Step 6: Final answer
    x = 20,912.20

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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.