Home / 20,879.22-31,336.28-19,565.54

Finding the Fourth Proportional to 20,879.22, 31,336.28 and 19,565.54

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Solution

The fourth proportional to 20,879.22, 31,336.28 and 19,565.54 is: 29,364.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.22 : 31,336.28 = 19,565.54 : x
  2. Step 2: Convert to fraction form
    20,879.22/31,336.28 = 19,565.54/x
  3. Step 3: Cross multiply
    20,879.22x = 31,336.28 × 19,565.54
  4. Step 4: Simplify right side
    20,879.22x = 613,111,239.79
  5. Step 5: Solve for x
    x = 613,111,239.79/20,879.22
  6. Step 6: Final answer
    x = 29,364.66

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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.