Home / 3,969.49-5,476.40-3,172.61

Finding the Fourth Proportional to 3,969.49, 5,476.40 and 3,172.61

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Solution

The fourth proportional to 3,969.49, 5,476.40 and 3,172.61 is: 4,377.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.49 : 5,476.40 = 3,172.61 : x
  2. Step 2: Convert to fraction form
    3,969.49/5,476.40 = 3,172.61/x
  3. Step 3: Cross multiply
    3,969.49x = 5,476.40 × 3,172.61
  4. Step 4: Simplify right side
    3,969.49x = 17,374,481.40
  5. Step 5: Solve for x
    x = 17,374,481.40/3,969.49
  6. Step 6: Final answer
    x = 4,377.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.