Home / 31,869.36-43,978.57-17,721.90

Finding the Fourth Proportional to 31,869.36, 43,978.57 and 17,721.90

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Solution

The fourth proportional to 31,869.36, 43,978.57 and 17,721.90 is: 24,455.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,869.36 : 43,978.57 = 17,721.90 : x
  2. Step 2: Convert to fraction form
    31,869.36/43,978.57 = 17,721.90/x
  3. Step 3: Cross multiply
    31,869.36x = 43,978.57 × 17,721.90
  4. Step 4: Simplify right side
    31,869.36x = 779,383,819.68
  5. Step 5: Solve for x
    x = 779,383,819.68/31,869.36
  6. Step 6: Final answer
    x = 24,455.58

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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.