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Finding the Fourth Proportional to 8,979.81, 13,472.46 and 3,136.92

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Solution

The fourth proportional to 8,979.81, 13,472.46 and 3,136.92 is: 4,706.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.81 : 13,472.46 = 3,136.92 : x
  2. Step 2: Convert to fraction form
    8,979.81/13,472.46 = 3,136.92/x
  3. Step 3: Cross multiply
    8,979.81x = 13,472.46 × 3,136.92
  4. Step 4: Simplify right side
    8,979.81x = 42,262,029.22
  5. Step 5: Solve for x
    x = 42,262,029.22/8,979.81
  6. Step 6: Final answer
    x = 4,706.34

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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.