Home / 21,122.62-31,662.97-11,766.92

Finding the Fourth Proportional to 21,122.62, 31,662.97 and 11,766.92

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Solution

The fourth proportional to 21,122.62, 31,662.97 and 11,766.92 is: 17,638.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.62 : 31,662.97 = 11,766.92 : x
  2. Step 2: Convert to fraction form
    21,122.62/31,662.97 = 11,766.92/x
  3. Step 3: Cross multiply
    21,122.62x = 31,662.97 × 11,766.92
  4. Step 4: Simplify right side
    21,122.62x = 372,575,447.22
  5. Step 5: Solve for x
    x = 372,575,447.22/21,122.62
  6. Step 6: Final answer
    x = 17,638.70

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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.