Home / 21,553.20-29,741.31-12,121.56

Finding the Fourth Proportional to 21,553.20, 29,741.31 and 12,121.56

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Solution

The fourth proportional to 21,553.20, 29,741.31 and 12,121.56 is: 16,726.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,553.20 : 29,741.31 = 12,121.56 : x
  2. Step 2: Convert to fraction form
    21,553.20/29,741.31 = 12,121.56/x
  3. Step 3: Cross multiply
    21,553.20x = 29,741.31 × 12,121.56
  4. Step 4: Simplify right side
    21,553.20x = 360,511,073.64
  5. Step 5: Solve for x
    x = 360,511,073.64/21,553.20
  6. Step 6: Final answer
    x = 16,726.57

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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.