Home / 11,921.26-17,877.84-4,128.25

Finding the Fourth Proportional to 11,921.26, 17,877.84 and 4,128.25

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Solution

The fourth proportional to 11,921.26, 17,877.84 and 4,128.25 is: 6,190.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.26 : 17,877.84 = 4,128.25 : x
  2. Step 2: Convert to fraction form
    11,921.26/17,877.84 = 4,128.25/x
  3. Step 3: Cross multiply
    11,921.26x = 17,877.84 × 4,128.25
  4. Step 4: Simplify right side
    11,921.26x = 73,804,192.98
  5. Step 5: Solve for x
    x = 73,804,192.98/11,921.26
  6. Step 6: Final answer
    x = 6,190.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.