Home / 21,979.67-30,331.94-11,908.14

Finding the Fourth Proportional to 21,979.67, 30,331.94 and 11,908.14

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Solution

The fourth proportional to 21,979.67, 30,331.94 and 11,908.14 is: 16,433.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.67 : 30,331.94 = 11,908.14 : x
  2. Step 2: Convert to fraction form
    21,979.67/30,331.94 = 11,908.14/x
  3. Step 3: Cross multiply
    21,979.67x = 30,331.94 × 11,908.14
  4. Step 4: Simplify right side
    21,979.67x = 361,196,928.45
  5. Step 5: Solve for x
    x = 361,196,928.45/21,979.67
  6. Step 6: Final answer
    x = 16,433.23

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1.5x scale

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.