Home / 3,936-5,431.65-2,343.74

Finding the Fourth Proportional to 3,936, 5,431.65 and 2,343.74

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Solution

The fourth proportional to 3,936, 5,431.65 and 2,343.74 is: 3,234.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936 : 5,431.65 = 2,343.74 : x
  2. Step 2: Convert to fraction form
    3,936/5,431.65 = 2,343.74/x
  3. Step 3: Cross multiply
    3,936x = 5,431.65 × 2,343.74
  4. Step 4: Simplify right side
    3,936x = 12,730,375.37
  5. Step 5: Solve for x
    x = 12,730,375.37/3,936
  6. Step 6: Final answer
    x = 3,234.34

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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.