Home / 21,979.29-30,331.37-11,908

Finding the Fourth Proportional to 21,979.29, 30,331.37 and 11,908

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Solution

The fourth proportional to 21,979.29, 30,331.37 and 11,908 is: 16,433.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.29 : 30,331.37 = 11,908 : x
  2. Step 2: Convert to fraction form
    21,979.29/30,331.37 = 11,908/x
  3. Step 3: Cross multiply
    21,979.29x = 30,331.37 × 11,908
  4. Step 4: Simplify right side
    21,979.29x = 361,185,983.73
  5. Step 5: Solve for x
    x = 361,185,983.73/21,979.29
  6. Step 6: Final answer
    x = 16,433.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.