Home / 3,936.90-5,432.99-2,168.50

Finding the Fourth Proportional to 3,936.90, 5,432.99 and 2,168.50

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Solution

The fourth proportional to 3,936.90, 5,432.99 and 2,168.50 is: 2,992.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.90 : 5,432.99 = 2,168.50 : x
  2. Step 2: Convert to fraction form
    3,936.90/5,432.99 = 2,168.50/x
  3. Step 3: Cross multiply
    3,936.90x = 5,432.99 × 2,168.50
  4. Step 4: Simplify right side
    3,936.90x = 11,781,438.82
  5. Step 5: Solve for x
    x = 11,781,438.82/3,936.90
  6. Step 6: Final answer
    x = 2,992.57

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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.