Home / 20,679.56-31,016.41-6,640.80

Finding the Fourth Proportional to 20,679.56, 31,016.41 and 6,640.80

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Solution

The fourth proportional to 20,679.56, 31,016.41 and 6,640.80 is: 9,960.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.56 : 31,016.41 = 6,640.80 : x
  2. Step 2: Convert to fraction form
    20,679.56/31,016.41 = 6,640.80/x
  3. Step 3: Cross multiply
    20,679.56x = 31,016.41 × 6,640.80
  4. Step 4: Simplify right side
    20,679.56x = 205,973,758.93
  5. Step 5: Solve for x
    x = 205,973,758.93/20,679.56
  6. Step 6: Final answer
    x = 9,960.26

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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.