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Finding the Fourth Proportional to 3,910.66, 5,419.36 and 3,836.84

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Solution

The fourth proportional to 3,910.66, 5,419.36 and 3,836.84 is: 5,317.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.66 : 5,419.36 = 3,836.84 : x
  2. Step 2: Convert to fraction form
    3,910.66/5,419.36 = 3,836.84/x
  3. Step 3: Cross multiply
    3,910.66x = 5,419.36 × 3,836.84
  4. Step 4: Simplify right side
    3,910.66x = 20,793,217.22
  5. Step 5: Solve for x
    x = 20,793,217.22/3,910.66
  6. Step 6: Final answer
    x = 5,317.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.