Home / 21,161.88-29,204.33-11,729.79

Finding the Fourth Proportional to 21,161.88, 29,204.33 and 11,729.79

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Solution

The fourth proportional to 21,161.88, 29,204.33 and 11,729.79 is: 16,187.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.88 : 29,204.33 = 11,729.79 : x
  2. Step 2: Convert to fraction form
    21,161.88/29,204.33 = 11,729.79/x
  3. Step 3: Cross multiply
    21,161.88x = 29,204.33 × 11,729.79
  4. Step 4: Simplify right side
    21,161.88x = 342,560,599.34
  5. Step 5: Solve for x
    x = 342,560,599.34/21,161.88
  6. Step 6: Final answer
    x = 16,187.63

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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.