Home / 20,129.31-30,204-9,043.92

Finding the Fourth Proportional to 20,129.31, 30,204 and 9,043.92

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Solution

The fourth proportional to 20,129.31, 30,204 and 9,043.92 is: 13,570.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.31 : 30,204 = 9,043.92 : x
  2. Step 2: Convert to fraction form
    20,129.31/30,204 = 9,043.92/x
  3. Step 3: Cross multiply
    20,129.31x = 30,204 × 9,043.92
  4. Step 4: Simplify right side
    20,129.31x = 273,162,559.68
  5. Step 5: Solve for x
    x = 273,162,559.68/20,129.31
  6. Step 6: Final answer
    x = 13,570.39

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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.