Home / 13,850.40-20,771.76-3,987

Finding the Fourth Proportional to 13,850.40, 20,771.76 and 3,987

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Solution

The fourth proportional to 13,850.40, 20,771.76 and 3,987 is: 5,979.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,850.40 : 20,771.76 = 3,987 : x
  2. Step 2: Convert to fraction form
    13,850.40/20,771.76 = 3,987/x
  3. Step 3: Cross multiply
    13,850.40x = 20,771.76 × 3,987
  4. Step 4: Simplify right side
    13,850.40x = 82,817,007.12
  5. Step 5: Solve for x
    x = 82,817,007.12/13,850.40
  6. Step 6: Final answer
    x = 5,979.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.