Home / 13,839.36-20,758.50-3,978.60

Finding the Fourth Proportional to 13,839.36, 20,758.50 and 3,978.60

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Solution

The fourth proportional to 13,839.36, 20,758.50 and 3,978.60 is: 5,967.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,839.36 : 20,758.50 = 3,978.60 : x
  2. Step 2: Convert to fraction form
    13,839.36/20,758.50 = 3,978.60/x
  3. Step 3: Cross multiply
    13,839.36x = 20,758.50 × 3,978.60
  4. Step 4: Simplify right side
    13,839.36x = 82,589,768.10
  5. Step 5: Solve for x
    x = 82,589,768.10/13,839.36
  6. Step 6: Final answer
    x = 5,967.74

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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.