Home / 21,257.10-31,871.97-10,163.55

Finding the Fourth Proportional to 21,257.10, 31,871.97 and 10,163.55

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Solution

The fourth proportional to 21,257.10, 31,871.97 and 10,163.55 is: 15,238.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,257.10 : 31,871.97 = 10,163.55 : x
  2. Step 2: Convert to fraction form
    21,257.10/31,871.97 = 10,163.55/x
  3. Step 3: Cross multiply
    21,257.10x = 31,871.97 × 10,163.55
  4. Step 4: Simplify right side
    21,257.10x = 323,932,360.69
  5. Step 5: Solve for x
    x = 323,932,360.69/21,257.10
  6. Step 6: Final answer
    x = 15,238.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.