Home / 21,272.39-31,891.15-8,801.36

Finding the Fourth Proportional to 21,272.39, 31,891.15 and 8,801.36

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Solution

The fourth proportional to 21,272.39, 31,891.15 and 8,801.36 is: 13,194.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.39 : 31,891.15 = 8,801.36 : x
  2. Step 2: Convert to fraction form
    21,272.39/31,891.15 = 8,801.36/x
  3. Step 3: Cross multiply
    21,272.39x = 31,891.15 × 8,801.36
  4. Step 4: Simplify right side
    21,272.39x = 280,685,463.10
  5. Step 5: Solve for x
    x = 280,685,463.10/21,272.39
  6. Step 6: Final answer
    x = 13,194.83

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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.