Home / 10,115.33-15,170.83-3,188.21

Finding the Fourth Proportional to 10,115.33, 15,170.83 and 3,188.21

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Solution

The fourth proportional to 10,115.33, 15,170.83 and 3,188.21 is: 4,781.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,115.33 : 15,170.83 = 3,188.21 : x
  2. Step 2: Convert to fraction form
    10,115.33/15,170.83 = 3,188.21/x
  3. Step 3: Cross multiply
    10,115.33x = 15,170.83 × 3,188.21
  4. Step 4: Simplify right side
    10,115.33x = 48,367,791.91
  5. Step 5: Solve for x
    x = 48,367,791.91/10,115.33
  6. Step 6: Final answer
    x = 4,781.63

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1.5x scale

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.