Home / 20,690.82-28,553.31-11,259.36

Finding the Fourth Proportional to 20,690.82, 28,553.31 and 11,259.36

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Solution

The fourth proportional to 20,690.82, 28,553.31 and 11,259.36 is: 15,537.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.82 : 28,553.31 = 11,259.36 : x
  2. Step 2: Convert to fraction form
    20,690.82/28,553.31 = 11,259.36/x
  3. Step 3: Cross multiply
    20,690.82x = 28,553.31 × 11,259.36
  4. Step 4: Simplify right side
    20,690.82x = 321,491,996.48
  5. Step 5: Solve for x
    x = 321,491,996.48/20,690.82
  6. Step 6: Final answer
    x = 15,537.91

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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.