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Finding the Fourth Proportional to 18,819.89, 25,906.27 and 16,266.49

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Solution

The fourth proportional to 18,819.89, 25,906.27 and 16,266.49 is: 22,391.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.89 : 25,906.27 = 16,266.49 : x
  2. Step 2: Convert to fraction form
    18,819.89/25,906.27 = 16,266.49/x
  3. Step 3: Cross multiply
    18,819.89x = 25,906.27 × 16,266.49
  4. Step 4: Simplify right side
    18,819.89x = 421,403,976.46
  5. Step 5: Solve for x
    x = 421,403,976.46/18,819.89
  6. Step 6: Final answer
    x = 22,391.41

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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.