Home / 21,961.11-30,305.97-11,889.47

Finding the Fourth Proportional to 21,961.11, 30,305.97 and 11,889.47

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Solution

The fourth proportional to 21,961.11, 30,305.97 and 11,889.47 is: 16,407.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,961.11 : 30,305.97 = 11,889.47 : x
  2. Step 2: Convert to fraction form
    21,961.11/30,305.97 = 11,889.47/x
  3. Step 3: Cross multiply
    21,961.11x = 30,305.97 × 11,889.47
  4. Step 4: Simplify right side
    21,961.11x = 360,321,921.14
  5. Step 5: Solve for x
    x = 360,321,921.14/21,961.11
  6. Step 6: Final answer
    x = 16,407.27

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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.