Home / 20,221.11-30,313.19-17,121.09

Finding the Fourth Proportional to 20,221.11, 30,313.19 and 17,121.09

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Solution

The fourth proportional to 20,221.11, 30,313.19 and 17,121.09 is: 25,665.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.11 : 30,313.19 = 17,121.09 : x
  2. Step 2: Convert to fraction form
    20,221.11/30,313.19 = 17,121.09/x
  3. Step 3: Cross multiply
    20,221.11x = 30,313.19 × 17,121.09
  4. Step 4: Simplify right side
    20,221.11x = 518,994,768.57
  5. Step 5: Solve for x
    x = 518,994,768.57/20,221.11
  6. Step 6: Final answer
    x = 25,665.99

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1.5x scale

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.