Home / 5,179.78-7,147.87-2,821.93

Finding the Fourth Proportional to 5,179.78, 7,147.87 and 2,821.93

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Solution

The fourth proportional to 5,179.78, 7,147.87 and 2,821.93 is: 3,894.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.78 : 7,147.87 = 2,821.93 : x
  2. Step 2: Convert to fraction form
    5,179.78/7,147.87 = 2,821.93/x
  3. Step 3: Cross multiply
    5,179.78x = 7,147.87 × 2,821.93
  4. Step 4: Simplify right side
    5,179.78x = 20,170,788.79
  5. Step 5: Solve for x
    x = 20,170,788.79/5,179.78
  6. Step 6: Final answer
    x = 3,894.14

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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.