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Finding the Fourth Proportional to 8,656.11, 12,979.72 and 3,972.09

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Solution

The fourth proportional to 8,656.11, 12,979.72 and 3,972.09 is: 5,956.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.11 : 12,979.72 = 3,972.09 : x
  2. Step 2: Convert to fraction form
    8,656.11/12,979.72 = 3,972.09/x
  3. Step 3: Cross multiply
    8,656.11x = 12,979.72 × 3,972.09
  4. Step 4: Simplify right side
    8,656.11x = 51,556,537.79
  5. Step 5: Solve for x
    x = 51,556,537.79/8,656.11
  6. Step 6: Final answer
    x = 5,956.09

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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.