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Finding the Fourth Proportional to 18,808.64, 25,956.96 and 12,516.80

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Solution

The fourth proportional to 18,808.64, 25,956.96 and 12,516.80 is: 17,273.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808.64 : 25,956.96 = 12,516.80 : x
  2. Step 2: Convert to fraction form
    18,808.64/25,956.96 = 12,516.80/x
  3. Step 3: Cross multiply
    18,808.64x = 25,956.96 × 12,516.80
  4. Step 4: Simplify right side
    18,808.64x = 324,898,076.93
  5. Step 5: Solve for x
    x = 324,898,076.93/18,808.64
  6. Step 6: Final answer
    x = 17,273.87

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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.