Home / 21,979.35-30,331.46-11,908.05

Finding the Fourth Proportional to 21,979.35, 30,331.46 and 11,908.05

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Solution

The fourth proportional to 21,979.35, 30,331.46 and 11,908.05 is: 16,433.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.35 : 30,331.46 = 11,908.05 : x
  2. Step 2: Convert to fraction form
    21,979.35/30,331.46 = 11,908.05/x
  3. Step 3: Cross multiply
    21,979.35x = 30,331.46 × 11,908.05
  4. Step 4: Simplify right side
    21,979.35x = 361,188,458.28
  5. Step 5: Solve for x
    x = 361,188,458.28/21,979.35
  6. Step 6: Final answer
    x = 16,433.08

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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.