Home / 21,380.30-29,504.82-11,689.79

Finding the Fourth Proportional to 21,380.30, 29,504.82 and 11,689.79

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Solution

The fourth proportional to 21,380.30, 29,504.82 and 11,689.79 is: 16,131.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,380.30 : 29,504.82 = 11,689.79 : x
  2. Step 2: Convert to fraction form
    21,380.30/29,504.82 = 11,689.79/x
  3. Step 3: Cross multiply
    21,380.30x = 29,504.82 × 11,689.79
  4. Step 4: Simplify right side
    21,380.30x = 344,905,196.41
  5. Step 5: Solve for x
    x = 344,905,196.41/21,380.30
  6. Step 6: Final answer
    x = 16,131.91

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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.