Home / 8,115.66-12,172.14-2,851.38

Finding the Fourth Proportional to 8,115.66, 12,172.14 and 2,851.38

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Solution

The fourth proportional to 8,115.66, 12,172.14 and 2,851.38 is: 4,276.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.66 : 12,172.14 = 2,851.38 : x
  2. Step 2: Convert to fraction form
    8,115.66/12,172.14 = 2,851.38/x
  3. Step 3: Cross multiply
    8,115.66x = 12,172.14 × 2,851.38
  4. Step 4: Simplify right side
    8,115.66x = 34,707,396.55
  5. Step 5: Solve for x
    x = 34,707,396.55/8,115.66
  6. Step 6: Final answer
    x = 4,276.60

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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.