Home / 8,121.78-11,202.84-5,604.12

Finding the Fourth Proportional to 8,121.78, 11,202.84 and 5,604.12

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Solution

The fourth proportional to 8,121.78, 11,202.84 and 5,604.12 is: 7,730.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.78 : 11,202.84 = 5,604.12 : x
  2. Step 2: Convert to fraction form
    8,121.78/11,202.84 = 5,604.12/x
  3. Step 3: Cross multiply
    8,121.78x = 11,202.84 × 5,604.12
  4. Step 4: Simplify right side
    8,121.78x = 62,782,059.70
  5. Step 5: Solve for x
    x = 62,782,059.70/8,121.78
  6. Step 6: Final answer
    x = 7,730.09

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1.5x scale

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.