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Finding the Fourth Proportional to 21,859.69, 32,789.49 and 9,371.62

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Solution

The fourth proportional to 21,859.69, 32,789.49 and 9,371.62 is: 14,057.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.69 : 32,789.49 = 9,371.62 : x
  2. Step 2: Convert to fraction form
    21,859.69/32,789.49 = 9,371.62/x
  3. Step 3: Cross multiply
    21,859.69x = 32,789.49 × 9,371.62
  4. Step 4: Simplify right side
    21,859.69x = 307,290,640.27
  5. Step 5: Solve for x
    x = 307,290,640.27/21,859.69
  6. Step 6: Final answer
    x = 14,057.41

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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.