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Finding the Fourth Proportional to 8,672.78, 13,009.20 and 2,516.78

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Solution

The fourth proportional to 8,672.78, 13,009.20 and 2,516.78 is: 3,775.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,672.78 : 13,009.20 = 2,516.78 : x
  2. Step 2: Convert to fraction form
    8,672.78/13,009.20 = 2,516.78/x
  3. Step 3: Cross multiply
    8,672.78x = 13,009.20 × 2,516.78
  4. Step 4: Simplify right side
    8,672.78x = 32,741,294.38
  5. Step 5: Solve for x
    x = 32,741,294.38/8,672.78
  6. Step 6: Final answer
    x = 3,775.18

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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.