Home / 20,826-28,739.88-11,394.66

Finding the Fourth Proportional to 20,826, 28,739.88 and 11,394.66

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Solution

The fourth proportional to 20,826, 28,739.88 and 11,394.66 is: 15,724.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,826 : 28,739.88 = 11,394.66 : x
  2. Step 2: Convert to fraction form
    20,826/28,739.88 = 11,394.66/x
  3. Step 3: Cross multiply
    20,826x = 28,739.88 × 11,394.66
  4. Step 4: Simplify right side
    20,826x = 327,481,161.04
  5. Step 5: Solve for x
    x = 327,481,161.04/20,826
  6. Step 6: Final answer
    x = 15,724.63

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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.