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Finding the Fourth Proportional to 8,517.36, 11,721.68 and 7,019.44

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Solution

The fourth proportional to 8,517.36, 11,721.68 and 7,019.44 is: 9,660.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,517.36 : 11,721.68 = 7,019.44 : x
  2. Step 2: Convert to fraction form
    8,517.36/11,721.68 = 7,019.44/x
  3. Step 3: Cross multiply
    8,517.36x = 11,721.68 × 7,019.44
  4. Step 4: Simplify right side
    8,517.36x = 82,279,629.46
  5. Step 5: Solve for x
    x = 82,279,629.46/8,517.36
  6. Step 6: Final answer
    x = 9,660.23

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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.