Home / 20,820-31,261.67-18,186

Finding the Fourth Proportional to 20,820, 31,261.67 and 18,186

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Solution

The fourth proportional to 20,820, 31,261.67 and 18,186 is: 27,306.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820 : 31,261.67 = 18,186 : x
  2. Step 2: Convert to fraction form
    20,820/31,261.67 = 18,186/x
  3. Step 3: Cross multiply
    20,820x = 31,261.67 × 18,186
  4. Step 4: Simplify right side
    20,820x = 568,524,730.62
  5. Step 5: Solve for x
    x = 568,524,730.62/20,820
  6. Step 6: Final answer
    x = 27,306.66

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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.