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Finding the Fourth Proportional to 18,672.64, 27,979.78 and 11,732.56

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Solution

The fourth proportional to 18,672.64, 27,979.78 and 11,732.56 is: 17,580.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.64 : 27,979.78 = 11,732.56 : x
  2. Step 2: Convert to fraction form
    18,672.64/27,979.78 = 11,732.56/x
  3. Step 3: Cross multiply
    18,672.64x = 27,979.78 × 11,732.56
  4. Step 4: Simplify right side
    18,672.64x = 328,274,527.74
  5. Step 5: Solve for x
    x = 328,274,527.74/18,672.64
  6. Step 6: Final answer
    x = 17,580.51

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1.5x scale

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.