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Finding the Fourth Proportional to 8,989.56, 12,404.94 and 5,161.26

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Solution

The fourth proportional to 8,989.56, 12,404.94 and 5,161.26 is: 7,122.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.56 : 12,404.94 = 5,161.26 : x
  2. Step 2: Convert to fraction form
    8,989.56/12,404.94 = 5,161.26/x
  3. Step 3: Cross multiply
    8,989.56x = 12,404.94 × 5,161.26
  4. Step 4: Simplify right side
    8,989.56x = 64,025,120.62
  5. Step 5: Solve for x
    x = 64,025,120.62/8,989.56
  6. Step 6: Final answer
    x = 7,122.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.