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Finding the Fourth Proportional to 8,388.09, 11,568.42 and 7,133.20

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Solution

The fourth proportional to 8,388.09, 11,568.42 and 7,133.20 is: 9,837.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,388.09 : 11,568.42 = 7,133.20 : x
  2. Step 2: Convert to fraction form
    8,388.09/11,568.42 = 7,133.20/x
  3. Step 3: Cross multiply
    8,388.09x = 11,568.42 × 7,133.20
  4. Step 4: Simplify right side
    8,388.09x = 82,519,824.62
  5. Step 5: Solve for x
    x = 82,519,824.62/8,388.09
  6. Step 6: Final answer
    x = 9,837.74

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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.