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Finding the Fourth Proportional to 18,622.65, 25,691.63 and 11,906.49

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Solution

The fourth proportional to 18,622.65, 25,691.63 and 11,906.49 is: 16,426.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,622.65 : 25,691.63 = 11,906.49 : x
  2. Step 2: Convert to fraction form
    18,622.65/25,691.63 = 11,906.49/x
  3. Step 3: Cross multiply
    18,622.65x = 25,691.63 × 11,906.49
  4. Step 4: Simplify right side
    18,622.65x = 305,897,076.15
  5. Step 5: Solve for x
    x = 305,897,076.15/18,622.65
  6. Step 6: Final answer
    x = 16,426.08

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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.