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Finding the Fourth Proportional to 8,979.61, 13,469.64 and 3,136.22

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Solution

The fourth proportional to 8,979.61, 13,469.64 and 3,136.22 is: 4,704.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.61 : 13,469.64 = 3,136.22 : x
  2. Step 2: Convert to fraction form
    8,979.61/13,469.64 = 3,136.22/x
  3. Step 3: Cross multiply
    8,979.61x = 13,469.64 × 3,136.22
  4. Step 4: Simplify right side
    8,979.61x = 42,243,743.40
  5. Step 5: Solve for x
    x = 42,243,743.40/8,979.61
  6. Step 6: Final answer
    x = 4,704.41

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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.