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Finding the Fourth Proportional to 12,393.88, 18,568.27 and 11,065.28

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Solution

The fourth proportional to 12,393.88, 18,568.27 and 11,065.28 is: 16,577.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,393.88 : 18,568.27 = 11,065.28 : x
  2. Step 2: Convert to fraction form
    12,393.88/18,568.27 = 11,065.28/x
  3. Step 3: Cross multiply
    12,393.88x = 18,568.27 × 11,065.28
  4. Step 4: Simplify right side
    12,393.88x = 205,462,986.16
  5. Step 5: Solve for x
    x = 205,462,986.16/12,393.88
  6. Step 6: Final answer
    x = 16,577.78

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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.