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Finding the Fourth Proportional to 8,979.17, 13,472 and 3,136.64

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Solution

The fourth proportional to 8,979.17, 13,472 and 3,136.64 is: 4,706.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.17 : 13,472 = 3,136.64 : x
  2. Step 2: Convert to fraction form
    8,979.17/13,472 = 3,136.64/x
  3. Step 3: Cross multiply
    8,979.17x = 13,472 × 3,136.64
  4. Step 4: Simplify right side
    8,979.17x = 42,256,814.08
  5. Step 5: Solve for x
    x = 42,256,814.08/8,979.17
  6. Step 6: Final answer
    x = 4,706.09

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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.