Home / 8,117.94-12,172.25-3,181.80

Finding the Fourth Proportional to 8,117.94, 12,172.25 and 3,181.80

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Solution

The fourth proportional to 8,117.94, 12,172.25 and 3,181.80 is: 4,770.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,117.94 : 12,172.25 = 3,181.80 : x
  2. Step 2: Convert to fraction form
    8,117.94/12,172.25 = 3,181.80/x
  3. Step 3: Cross multiply
    8,117.94x = 12,172.25 × 3,181.80
  4. Step 4: Simplify right side
    8,117.94x = 38,729,665.05
  5. Step 5: Solve for x
    x = 38,729,665.05/8,117.94
  6. Step 6: Final answer
    x = 4,770.87

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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.