Home / 21,979.12-33,141.08-20,142.04

Finding the Fourth Proportional to 21,979.12, 33,141.08 and 20,142.04

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Solution

The fourth proportional to 21,979.12, 33,141.08 and 20,142.04 is: 30,371.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.12 : 33,141.08 = 20,142.04 : x
  2. Step 2: Convert to fraction form
    21,979.12/33,141.08 = 20,142.04/x
  3. Step 3: Cross multiply
    21,979.12x = 33,141.08 × 20,142.04
  4. Step 4: Simplify right side
    21,979.12x = 667,528,959.00
  5. Step 5: Solve for x
    x = 667,528,959.00/21,979.12
  6. Step 6: Final answer
    x = 30,371.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.