Home / 3,936.77-5,432.78-2,168.39

Finding the Fourth Proportional to 3,936.77, 5,432.78 and 2,168.39

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Solution

The fourth proportional to 3,936.77, 5,432.78 and 2,168.39 is: 2,992.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.77 : 5,432.78 = 2,168.39 : x
  2. Step 2: Convert to fraction form
    3,936.77/5,432.78 = 2,168.39/x
  3. Step 3: Cross multiply
    3,936.77x = 5,432.78 × 2,168.39
  4. Step 4: Simplify right side
    3,936.77x = 11,780,364.08
  5. Step 5: Solve for x
    x = 11,780,364.08/3,936.77
  6. Step 6: Final answer
    x = 2,992.39

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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.