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Finding the Fourth Proportional to 18,504.18, 27,744.66 and 8,645.40

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Solution

The fourth proportional to 18,504.18, 27,744.66 and 8,645.40 is: 12,962.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,504.18 : 27,744.66 = 8,645.40 : x
  2. Step 2: Convert to fraction form
    18,504.18/27,744.66 = 8,645.40/x
  3. Step 3: Cross multiply
    18,504.18x = 27,744.66 × 8,645.40
  4. Step 4: Simplify right side
    18,504.18x = 239,863,683.56
  5. Step 5: Solve for x
    x = 239,863,683.56/18,504.18
  6. Step 6: Final answer
    x = 12,962.68

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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.