Home / 21,217.88-29,279.90-11,787.06

Finding the Fourth Proportional to 21,217.88, 29,279.90 and 11,787.06

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Solution

The fourth proportional to 21,217.88, 29,279.90 and 11,787.06 is: 16,265.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,217.88 : 29,279.90 = 11,787.06 : x
  2. Step 2: Convert to fraction form
    21,217.88/29,279.90 = 11,787.06/x
  3. Step 3: Cross multiply
    21,217.88x = 29,279.90 × 11,787.06
  4. Step 4: Simplify right side
    21,217.88x = 345,123,938.09
  5. Step 5: Solve for x
    x = 345,123,938.09/21,217.88
  6. Step 6: Final answer
    x = 16,265.71

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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.