Home / 10,120.32-15,179.82-3,099.78

Finding the Fourth Proportional to 10,120.32, 15,179.82 and 3,099.78

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Solution

The fourth proportional to 10,120.32, 15,179.82 and 3,099.78 is: 4,649.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120.32 : 15,179.82 = 3,099.78 : x
  2. Step 2: Convert to fraction form
    10,120.32/15,179.82 = 3,099.78/x
  3. Step 3: Cross multiply
    10,120.32x = 15,179.82 × 3,099.78
  4. Step 4: Simplify right side
    10,120.32x = 47,054,102.44
  5. Step 5: Solve for x
    x = 47,054,102.44/10,120.32
  6. Step 6: Final answer
    x = 4,649.47

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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.