Home / 21,857.24-30,163.14-12,425.80

Finding the Fourth Proportional to 21,857.24, 30,163.14 and 12,425.80

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Solution

The fourth proportional to 21,857.24, 30,163.14 and 12,425.80 is: 17,147.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,857.24 : 30,163.14 = 12,425.80 : x
  2. Step 2: Convert to fraction form
    21,857.24/30,163.14 = 12,425.80/x
  3. Step 3: Cross multiply
    21,857.24x = 30,163.14 × 12,425.80
  4. Step 4: Simplify right side
    21,857.24x = 374,801,145.01
  5. Step 5: Solve for x
    x = 374,801,145.01/21,857.24
  6. Step 6: Final answer
    x = 17,147.69

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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.