Home / 20,142.70-30,211.31-5,910.80

Finding the Fourth Proportional to 20,142.70, 30,211.31 and 5,910.80

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Solution

The fourth proportional to 20,142.70, 30,211.31 and 5,910.80 is: 8,865.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.70 : 30,211.31 = 5,910.80 : x
  2. Step 2: Convert to fraction form
    20,142.70/30,211.31 = 5,910.80/x
  3. Step 3: Cross multiply
    20,142.70x = 30,211.31 × 5,910.80
  4. Step 4: Simplify right side
    20,142.70x = 178,572,874.87
  5. Step 5: Solve for x
    x = 178,572,874.87/20,142.70
  6. Step 6: Final answer
    x = 8,865.39

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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.