Home / 20,620.44-28,456.10-11,189

Finding the Fourth Proportional to 20,620.44, 28,456.10 and 11,189

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Solution

The fourth proportional to 20,620.44, 28,456.10 and 11,189 is: 15,440.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.44 : 28,456.10 = 11,189 : x
  2. Step 2: Convert to fraction form
    20,620.44/28,456.10 = 11,189/x
  3. Step 3: Cross multiply
    20,620.44x = 28,456.10 × 11,189
  4. Step 4: Simplify right side
    20,620.44x = 318,395,302.90
  5. Step 5: Solve for x
    x = 318,395,302.90/20,620.44
  6. Step 6: Final answer
    x = 15,440.76

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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.