Home / 13,840.36-20,760-3,979.60

Finding the Fourth Proportional to 13,840.36, 20,760 and 3,979.60

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Solution

The fourth proportional to 13,840.36, 20,760 and 3,979.60 is: 5,969.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.36 : 20,760 = 3,979.60 : x
  2. Step 2: Convert to fraction form
    13,840.36/20,760 = 3,979.60/x
  3. Step 3: Cross multiply
    13,840.36x = 20,760 × 3,979.60
  4. Step 4: Simplify right side
    13,840.36x = 82,616,496
  5. Step 5: Solve for x
    x = 82,616,496/13,840.36
  6. Step 6: Final answer
    x = 5,969.24

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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.