Home / 21,731.25-29,984.78-13,227.66

Finding the Fourth Proportional to 21,731.25, 29,984.78 and 13,227.66

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Solution

The fourth proportional to 21,731.25, 29,984.78 and 13,227.66 is: 18,251.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,731.25 : 29,984.78 = 13,227.66 : x
  2. Step 2: Convert to fraction form
    21,731.25/29,984.78 = 13,227.66/x
  3. Step 3: Cross multiply
    21,731.25x = 29,984.78 × 13,227.66
  4. Step 4: Simplify right side
    21,731.25x = 396,628,408.88
  5. Step 5: Solve for x
    x = 396,628,408.88/21,731.25
  6. Step 6: Final answer
    x = 18,251.52

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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.