Home / 21,187.85-29,239.79-11,627.82

Finding the Fourth Proportional to 21,187.85, 29,239.79 and 11,627.82

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Solution

The fourth proportional to 21,187.85, 29,239.79 and 11,627.82 is: 16,046.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.85 : 29,239.79 = 11,627.82 : x
  2. Step 2: Convert to fraction form
    21,187.85/29,239.79 = 11,627.82/x
  3. Step 3: Cross multiply
    21,187.85x = 29,239.79 × 11,627.82
  4. Step 4: Simplify right side
    21,187.85x = 339,994,956.82
  5. Step 5: Solve for x
    x = 339,994,956.82/21,187.85
  6. Step 6: Final answer
    x = 16,046.70

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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.