Home / 8,115.76-12,170.04-3,181.60

Finding the Fourth Proportional to 8,115.76, 12,170.04 and 3,181.60

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Solution

The fourth proportional to 8,115.76, 12,170.04 and 3,181.60 is: 4,770.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.76 : 12,170.04 = 3,181.60 : x
  2. Step 2: Convert to fraction form
    8,115.76/12,170.04 = 3,181.60/x
  3. Step 3: Cross multiply
    8,115.76x = 12,170.04 × 3,181.60
  4. Step 4: Simplify right side
    8,115.76x = 38,720,199.26
  5. Step 5: Solve for x
    x = 38,720,199.26/8,115.76
  6. Step 6: Final answer
    x = 4,770.99

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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.