Home / 20,425.82-28,186.90-12,481.34

Finding the Fourth Proportional to 20,425.82, 28,186.90 and 12,481.34

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Solution

The fourth proportional to 20,425.82, 28,186.90 and 12,481.34 is: 17,223.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.82 : 28,186.90 = 12,481.34 : x
  2. Step 2: Convert to fraction form
    20,425.82/28,186.90 = 12,481.34/x
  3. Step 3: Cross multiply
    20,425.82x = 28,186.90 × 12,481.34
  4. Step 4: Simplify right side
    20,425.82x = 351,810,282.45
  5. Step 5: Solve for x
    x = 351,810,282.45/20,425.82
  6. Step 6: Final answer
    x = 17,223.80

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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.