Home / 5,115.60-7,668.90-2,481.78

Finding the Fourth Proportional to 5,115.60, 7,668.90 and 2,481.78

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Solution

The fourth proportional to 5,115.60, 7,668.90 and 2,481.78 is: 3,720.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.60 : 7,668.90 = 2,481.78 : x
  2. Step 2: Convert to fraction form
    5,115.60/7,668.90 = 2,481.78/x
  3. Step 3: Cross multiply
    5,115.60x = 7,668.90 × 2,481.78
  4. Step 4: Simplify right side
    5,115.60x = 19,032,522.64
  5. Step 5: Solve for x
    x = 19,032,522.64/5,115.60
  6. Step 6: Final answer
    x = 3,720.49

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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.