Home / 20,939.50-31,408.99-6,147.89

Finding the Fourth Proportional to 20,939.50, 31,408.99 and 6,147.89

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Solution

The fourth proportional to 20,939.50, 31,408.99 and 6,147.89 is: 9,221.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.50 : 31,408.99 = 6,147.89 : x
  2. Step 2: Convert to fraction form
    20,939.50/31,408.99 = 6,147.89/x
  3. Step 3: Cross multiply
    20,939.50x = 31,408.99 × 6,147.89
  4. Step 4: Simplify right side
    20,939.50x = 193,098,858.49
  5. Step 5: Solve for x
    x = 193,098,858.49/20,939.50
  6. Step 6: Final answer
    x = 9,221.75

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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.