Home / 21,286.82-29,377.15-11,855.36

Finding the Fourth Proportional to 21,286.82, 29,377.15 and 11,855.36

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Solution

The fourth proportional to 21,286.82, 29,377.15 and 11,855.36 is: 16,361.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.82 : 29,377.15 = 11,855.36 : x
  2. Step 2: Convert to fraction form
    21,286.82/29,377.15 = 11,855.36/x
  3. Step 3: Cross multiply
    21,286.82x = 29,377.15 × 11,855.36
  4. Step 4: Simplify right side
    21,286.82x = 348,276,512.50
  5. Step 5: Solve for x
    x = 348,276,512.50/21,286.82
  6. Step 6: Final answer
    x = 16,361.14

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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.