Home / 3,936-5,431.14-2,167.32

Finding the Fourth Proportional to 3,936, 5,431.14 and 2,167.32

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Solution

The fourth proportional to 3,936, 5,431.14 and 2,167.32 is: 2,990.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936 : 5,431.14 = 2,167.32 : x
  2. Step 2: Convert to fraction form
    3,936/5,431.14 = 2,167.32/x
  3. Step 3: Cross multiply
    3,936x = 5,431.14 × 2,167.32
  4. Step 4: Simplify right side
    3,936x = 11,771,018.34
  5. Step 5: Solve for x
    x = 11,771,018.34/3,936
  6. Step 6: Final answer
    x = 2,990.60

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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.