Home / 3,921.11-5,878.64-3,400.39

Finding the Fourth Proportional to 3,921.11, 5,878.64 and 3,400.39

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Solution

The fourth proportional to 3,921.11, 5,878.64 and 3,400.39 is: 5,097.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.11 : 5,878.64 = 3,400.39 : x
  2. Step 2: Convert to fraction form
    3,921.11/5,878.64 = 3,400.39/x
  3. Step 3: Cross multiply
    3,921.11x = 5,878.64 × 3,400.39
  4. Step 4: Simplify right side
    3,921.11x = 19,989,636.97
  5. Step 5: Solve for x
    x = 19,989,636.97/3,921.11
  6. Step 6: Final answer
    x = 5,097.96

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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.