Home / 20,907.11-28,851.83-11,954.79

Finding the Fourth Proportional to 20,907.11, 28,851.83 and 11,954.79

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Solution

The fourth proportional to 20,907.11, 28,851.83 and 11,954.79 is: 16,497.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.11 : 28,851.83 = 11,954.79 : x
  2. Step 2: Convert to fraction form
    20,907.11/28,851.83 = 11,954.79/x
  3. Step 3: Cross multiply
    20,907.11x = 28,851.83 × 11,954.79
  4. Step 4: Simplify right side
    20,907.11x = 344,917,508.99
  5. Step 5: Solve for x
    x = 344,917,508.99/20,907.11
  6. Step 6: Final answer
    x = 16,497.62

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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.