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Finding the Fourth Proportional to 8,494.16, 11,720.05 and 5,136.90

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Solution

The fourth proportional to 8,494.16, 11,720.05 and 5,136.90 is: 7,087.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,494.16 : 11,720.05 = 5,136.90 : x
  2. Step 2: Convert to fraction form
    8,494.16/11,720.05 = 5,136.90/x
  3. Step 3: Cross multiply
    8,494.16x = 11,720.05 × 5,136.90
  4. Step 4: Simplify right side
    8,494.16x = 60,204,699.16
  5. Step 5: Solve for x
    x = 60,204,699.16/8,494.16
  6. Step 6: Final answer
    x = 7,087.78

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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.