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Finding the Fourth Proportional to 8,494.78, 11,719.97 and 5,136.32

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Solution

The fourth proportional to 8,494.78, 11,719.97 and 5,136.32 is: 7,086.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,494.78 : 11,719.97 = 5,136.32 : x
  2. Step 2: Convert to fraction form
    8,494.78/11,719.97 = 5,136.32/x
  3. Step 3: Cross multiply
    8,494.78x = 11,719.97 × 5,136.32
  4. Step 4: Simplify right side
    8,494.78x = 60,197,516.31
  5. Step 5: Solve for x
    x = 60,197,516.31/8,494.78
  6. Step 6: Final answer
    x = 7,086.41

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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.