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Finding the Fourth Proportional to 15,906.20, 21,949.45 and 8,832.06

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Solution

The fourth proportional to 15,906.20, 21,949.45 and 8,832.06 is: 12,187.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,906.20 : 21,949.45 = 8,832.06 : x
  2. Step 2: Convert to fraction form
    15,906.20/21,949.45 = 8,832.06/x
  3. Step 3: Cross multiply
    15,906.20x = 21,949.45 × 8,832.06
  4. Step 4: Simplify right side
    15,906.20x = 193,858,859.37
  5. Step 5: Solve for x
    x = 193,858,859.37/15,906.20
  6. Step 6: Final answer
    x = 12,187.63

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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.