Home / 20,768.44-31,152.50-5,185.96

Finding the Fourth Proportional to 20,768.44, 31,152.50 and 5,185.96

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Solution

The fourth proportional to 20,768.44, 31,152.50 and 5,185.96 is: 7,778.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.44 : 31,152.50 = 5,185.96 : x
  2. Step 2: Convert to fraction form
    20,768.44/31,152.50 = 5,185.96/x
  3. Step 3: Cross multiply
    20,768.44x = 31,152.50 × 5,185.96
  4. Step 4: Simplify right side
    20,768.44x = 161,555,618.90
  5. Step 5: Solve for x
    x = 161,555,618.90/20,768.44
  6. Step 6: Final answer
    x = 7,778.90

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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.