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Finding the Fourth Proportional to 18,640.72, 27,965.27 and 9,881.79

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Solution

The fourth proportional to 18,640.72, 27,965.27 and 9,881.79 is: 14,824.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,640.72 : 27,965.27 = 9,881.79 : x
  2. Step 2: Convert to fraction form
    18,640.72/27,965.27 = 9,881.79/x
  3. Step 3: Cross multiply
    18,640.72x = 27,965.27 × 9,881.79
  4. Step 4: Simplify right side
    18,640.72x = 276,346,925.43
  5. Step 5: Solve for x
    x = 276,346,925.43/18,640.72
  6. Step 6: Final answer
    x = 14,824.91

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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.