Home / 7,910.28-11,865.42-2,978.58

Finding the Fourth Proportional to 7,910.28, 11,865.42 and 2,978.58

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Solution

The fourth proportional to 7,910.28, 11,865.42 and 2,978.58 is: 4,467.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,910.28 : 11,865.42 = 2,978.58 : x
  2. Step 2: Convert to fraction form
    7,910.28/11,865.42 = 2,978.58/x
  3. Step 3: Cross multiply
    7,910.28x = 11,865.42 × 2,978.58
  4. Step 4: Simplify right side
    7,910.28x = 35,342,102.70
  5. Step 5: Solve for x
    x = 35,342,102.70/7,910.28
  6. Step 6: Final answer
    x = 4,467.87

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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.