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Finding the Fourth Proportional to 22,371.76, 30,819.64 and 15,644.80

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Solution

The fourth proportional to 22,371.76, 30,819.64 and 15,644.80 is: 21,552.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,371.76 : 30,819.64 = 15,644.80 : x
  2. Step 2: Convert to fraction form
    22,371.76/30,819.64 = 15,644.80/x
  3. Step 3: Cross multiply
    22,371.76x = 30,819.64 × 15,644.80
  4. Step 4: Simplify right side
    22,371.76x = 482,167,103.87
  5. Step 5: Solve for x
    x = 482,167,103.87/22,371.76
  6. Step 6: Final answer
    x = 21,552.49

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1.5x scale

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.