Home / 3,936.70-5,428.13-2,940.29

Finding the Fourth Proportional to 3,936.70, 5,428.13 and 2,940.29

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Solution

The fourth proportional to 3,936.70, 5,428.13 and 2,940.29 is: 4,054.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.70 : 5,428.13 = 2,940.29 : x
  2. Step 2: Convert to fraction form
    3,936.70/5,428.13 = 2,940.29/x
  3. Step 3: Cross multiply
    3,936.70x = 5,428.13 × 2,940.29
  4. Step 4: Simplify right side
    3,936.70x = 15,960,276.36
  5. Step 5: Solve for x
    x = 15,960,276.36/3,936.70
  6. Step 6: Final answer
    x = 4,054.23

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1.5x scale

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.