Home / 20,890.53-31,319.73-6,842.03

Finding the Fourth Proportional to 20,890.53, 31,319.73 and 6,842.03

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Solution

The fourth proportional to 20,890.53, 31,319.73 and 6,842.03 is: 10,257.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.53 : 31,319.73 = 6,842.03 : x
  2. Step 2: Convert to fraction form
    20,890.53/31,319.73 = 6,842.03/x
  3. Step 3: Cross multiply
    20,890.53x = 31,319.73 × 6,842.03
  4. Step 4: Simplify right side
    20,890.53x = 214,290,375.65
  5. Step 5: Solve for x
    x = 214,290,375.65/20,890.53
  6. Step 6: Final answer
    x = 10,257.78

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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.