Home / 20,834.32-31,261.20-10,317.28

Finding the Fourth Proportional to 20,834.32, 31,261.20 and 10,317.28

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Solution

The fourth proportional to 20,834.32, 31,261.20 and 10,317.28 is: 15,480.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,834.32 : 31,261.20 = 10,317.28 : x
  2. Step 2: Convert to fraction form
    20,834.32/31,261.20 = 10,317.28/x
  3. Step 3: Cross multiply
    20,834.32x = 31,261.20 × 10,317.28
  4. Step 4: Simplify right side
    20,834.32x = 322,530,553.54
  5. Step 5: Solve for x
    x = 322,530,553.54/20,834.32
  6. Step 6: Final answer
    x = 15,480.73

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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.