Home / 7,815.78-11,722.35-2,550.90

Finding the Fourth Proportional to 7,815.78, 11,722.35 and 2,550.90

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Solution

The fourth proportional to 7,815.78, 11,722.35 and 2,550.90 is: 3,825.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.78 : 11,722.35 = 2,550.90 : x
  2. Step 2: Convert to fraction form
    7,815.78/11,722.35 = 2,550.90/x
  3. Step 3: Cross multiply
    7,815.78x = 11,722.35 × 2,550.90
  4. Step 4: Simplify right side
    7,815.78x = 29,902,542.62
  5. Step 5: Solve for x
    x = 29,902,542.62/7,815.78
  6. Step 6: Final answer
    x = 3,825.92

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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.