Home / 5,197.72-7,172.60-2,839.86

Finding the Fourth Proportional to 5,197.72, 7,172.60 and 2,839.86

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Solution

The fourth proportional to 5,197.72, 7,172.60 and 2,839.86 is: 3,918.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,197.72 : 7,172.60 = 2,839.86 : x
  2. Step 2: Convert to fraction form
    5,197.72/7,172.60 = 2,839.86/x
  3. Step 3: Cross multiply
    5,197.72x = 7,172.60 × 2,839.86
  4. Step 4: Simplify right side
    5,197.72x = 20,369,181.61
  5. Step 5: Solve for x
    x = 20,369,181.61/5,197.72
  6. Step 6: Final answer
    x = 3,918.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.