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Finding the Fourth Proportional to 11,448.90, 17,136.90 and 8,168.40

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Solution

The fourth proportional to 11,448.90, 17,136.90 and 8,168.40 is: 12,226.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,448.90 : 17,136.90 = 8,168.40 : x
  2. Step 2: Convert to fraction form
    11,448.90/17,136.90 = 8,168.40/x
  3. Step 3: Cross multiply
    11,448.90x = 17,136.90 × 8,168.40
  4. Step 4: Simplify right side
    11,448.90x = 139,981,053.96
  5. Step 5: Solve for x
    x = 139,981,053.96/11,448.90
  6. Step 6: Final answer
    x = 12,226.59

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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.