Home / 21,265.78-31,904.92-8,786.52

Finding the Fourth Proportional to 21,265.78, 31,904.92 and 8,786.52

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Solution

The fourth proportional to 21,265.78, 31,904.92 and 8,786.52 is: 13,182.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,265.78 : 31,904.92 = 8,786.52 : x
  2. Step 2: Convert to fraction form
    21,265.78/31,904.92 = 8,786.52/x
  3. Step 3: Cross multiply
    21,265.78x = 31,904.92 × 8,786.52
  4. Step 4: Simplify right side
    21,265.78x = 280,333,217.68
  5. Step 5: Solve for x
    x = 280,333,217.68/21,265.78
  6. Step 6: Final answer
    x = 13,182.36

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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.