Home / 8,921.85-13,388.94-3,078.48

Finding the Fourth Proportional to 8,921.85, 13,388.94 and 3,078.48

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Solution

The fourth proportional to 8,921.85, 13,388.94 and 3,078.48 is: 4,619.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.85 : 13,388.94 = 3,078.48 : x
  2. Step 2: Convert to fraction form
    8,921.85/13,388.94 = 3,078.48/x
  3. Step 3: Cross multiply
    8,921.85x = 13,388.94 × 3,078.48
  4. Step 4: Simplify right side
    8,921.85x = 41,217,584.01
  5. Step 5: Solve for x
    x = 41,217,584.01/8,921.85
  6. Step 6: Final answer
    x = 4,619.85

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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.