Home / 20,517.44-30,781.70-6,478.04

Finding the Fourth Proportional to 20,517.44, 30,781.70 and 6,478.04

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Solution

The fourth proportional to 20,517.44, 30,781.70 and 6,478.04 is: 9,718.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.44 : 30,781.70 = 6,478.04 : x
  2. Step 2: Convert to fraction form
    20,517.44/30,781.70 = 6,478.04/x
  3. Step 3: Cross multiply
    20,517.44x = 30,781.70 × 6,478.04
  4. Step 4: Simplify right side
    20,517.44x = 199,405,083.87
  5. Step 5: Solve for x
    x = 199,405,083.87/20,517.44
  6. Step 6: Final answer
    x = 9,718.81

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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.