Home / 21,212.88-29,274.68-11,781.44

Finding the Fourth Proportional to 21,212.88, 29,274.68 and 11,781.44

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Solution

The fourth proportional to 21,212.88, 29,274.68 and 11,781.44 is: 16,258.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.88 : 29,274.68 = 11,781.44 : x
  2. Step 2: Convert to fraction form
    21,212.88/29,274.68 = 11,781.44/x
  3. Step 3: Cross multiply
    21,212.88x = 29,274.68 × 11,781.44
  4. Step 4: Simplify right side
    21,212.88x = 344,897,885.94
  5. Step 5: Solve for x
    x = 344,897,885.94/21,212.88
  6. Step 6: Final answer
    x = 16,258.89

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1.5x scale

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.