Home / 20,819.22-31,214.22-7,669.90

Finding the Fourth Proportional to 20,819.22, 31,214.22 and 7,669.90

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Solution

The fourth proportional to 20,819.22, 31,214.22 and 7,669.90 is: 11,499.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.22 : 31,214.22 = 7,669.90 : x
  2. Step 2: Convert to fraction form
    20,819.22/31,214.22 = 7,669.90/x
  3. Step 3: Cross multiply
    20,819.22x = 31,214.22 × 7,669.90
  4. Step 4: Simplify right side
    20,819.22x = 239,409,945.98
  5. Step 5: Solve for x
    x = 239,409,945.98/20,819.22
  6. Step 6: Final answer
    x = 11,499.47

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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.