Home / 20,945.58-31,418.10-5,150.75

Finding the Fourth Proportional to 20,945.58, 31,418.10 and 5,150.75

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Solution

The fourth proportional to 20,945.58, 31,418.10 and 5,150.75 is: 7,726.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.58 : 31,418.10 = 5,150.75 : x
  2. Step 2: Convert to fraction form
    20,945.58/31,418.10 = 5,150.75/x
  3. Step 3: Cross multiply
    20,945.58x = 31,418.10 × 5,150.75
  4. Step 4: Simplify right side
    20,945.58x = 161,826,785.01
  5. Step 5: Solve for x
    x = 161,826,785.01/20,945.58
  6. Step 6: Final answer
    x = 7,726.06

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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.