Home / 13,840.31-20,760.35-3,979.55

Finding the Fourth Proportional to 13,840.31, 20,760.35 and 3,979.55

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Solution

The fourth proportional to 13,840.31, 20,760.35 and 3,979.55 is: 5,969.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.31 : 20,760.35 = 3,979.55 : x
  2. Step 2: Convert to fraction form
    13,840.31/20,760.35 = 3,979.55/x
  3. Step 3: Cross multiply
    13,840.31x = 20,760.35 × 3,979.55
  4. Step 4: Simplify right side
    13,840.31x = 82,616,727.14
  5. Step 5: Solve for x
    x = 82,616,727.14/13,840.31
  6. Step 6: Final answer
    x = 5,969.29

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1.5x scale

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.