Home / 20,822.05-28,734.19-11,390.50

Finding the Fourth Proportional to 20,822.05, 28,734.19 and 11,390.50

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Solution

The fourth proportional to 20,822.05, 28,734.19 and 11,390.50 is: 15,718.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.05 : 28,734.19 = 11,390.50 : x
  2. Step 2: Convert to fraction form
    20,822.05/28,734.19 = 11,390.50/x
  3. Step 3: Cross multiply
    20,822.05x = 28,734.19 × 11,390.50
  4. Step 4: Simplify right side
    20,822.05x = 327,296,791.20
  5. Step 5: Solve for x
    x = 327,296,791.20/20,822.05
  6. Step 6: Final answer
    x = 15,718.76

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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.