Home / 31,418.20-43,355.82-20,071.72

Finding the Fourth Proportional to 31,418.20, 43,355.82 and 20,071.72

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Solution

The fourth proportional to 31,418.20, 43,355.82 and 20,071.72 is: 27,698.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,418.20 : 43,355.82 = 20,071.72 : x
  2. Step 2: Convert to fraction form
    31,418.20/43,355.82 = 20,071.72/x
  3. Step 3: Cross multiply
    31,418.20x = 43,355.82 × 20,071.72
  4. Step 4: Simplify right side
    31,418.20x = 870,225,879.41
  5. Step 5: Solve for x
    x = 870,225,879.41/31,418.20
  6. Step 6: Final answer
    x = 27,698.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.