Home / 20,861.16-31,296.62-6,821.85

Finding the Fourth Proportional to 20,861.16, 31,296.62 and 6,821.85

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Solution

The fourth proportional to 20,861.16, 31,296.62 and 6,821.85 is: 10,234.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.16 : 31,296.62 = 6,821.85 : x
  2. Step 2: Convert to fraction form
    20,861.16/31,296.62 = 6,821.85/x
  3. Step 3: Cross multiply
    20,861.16x = 31,296.62 × 6,821.85
  4. Step 4: Simplify right side
    20,861.16x = 213,500,813.04
  5. Step 5: Solve for x
    x = 213,500,813.04/20,861.16
  6. Step 6: Final answer
    x = 10,234.37

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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.