Home / 20,383.12-28,126.20-11,998

Finding the Fourth Proportional to 20,383.12, 28,126.20 and 11,998

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Solution

The fourth proportional to 20,383.12, 28,126.20 and 11,998 is: 16,555.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.12 : 28,126.20 = 11,998 : x
  2. Step 2: Convert to fraction form
    20,383.12/28,126.20 = 11,998/x
  3. Step 3: Cross multiply
    20,383.12x = 28,126.20 × 11,998
  4. Step 4: Simplify right side
    20,383.12x = 337,458,147.60
  5. Step 5: Solve for x
    x = 337,458,147.60/20,383.12
  6. Step 6: Final answer
    x = 16,555.77

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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.