Home / 13,979.82-20,969.94-4,119.36

Finding the Fourth Proportional to 13,979.82, 20,969.94 and 4,119.36

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Solution

The fourth proportional to 13,979.82, 20,969.94 and 4,119.36 is: 6,179.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.82 : 20,969.94 = 4,119.36 : x
  2. Step 2: Convert to fraction form
    13,979.82/20,969.94 = 4,119.36/x
  3. Step 3: Cross multiply
    13,979.82x = 20,969.94 × 4,119.36
  4. Step 4: Simplify right side
    13,979.82x = 86,382,732.04
  5. Step 5: Solve for x
    x = 86,382,732.04/13,979.82
  6. Step 6: Final answer
    x = 6,179.10

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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.