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Finding the Fourth Proportional to 8,018.40, 12,016.80 and 3,396

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Solution

The fourth proportional to 8,018.40, 12,016.80 and 3,396 is: 5,089.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,018.40 : 12,016.80 = 3,396 : x
  2. Step 2: Convert to fraction form
    8,018.40/12,016.80 = 3,396/x
  3. Step 3: Cross multiply
    8,018.40x = 12,016.80 × 3,396
  4. Step 4: Simplify right side
    8,018.40x = 40,809,052.80
  5. Step 5: Solve for x
    x = 40,809,052.80/8,018.40
  6. Step 6: Final answer
    x = 5,089.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.