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Finding the Fourth Proportional to 11,869.39, 17,810.27 and 8,609.39

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Solution

The fourth proportional to 11,869.39, 17,810.27 and 8,609.39 is: 12,918.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,869.39 : 17,810.27 = 8,609.39 : x
  2. Step 2: Convert to fraction form
    11,869.39/17,810.27 = 8,609.39/x
  3. Step 3: Cross multiply
    11,869.39x = 17,810.27 × 8,609.39
  4. Step 4: Simplify right side
    11,869.39x = 153,335,560.44
  5. Step 5: Solve for x
    x = 153,335,560.44/11,869.39
  6. Step 6: Final answer
    x = 12,918.57

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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.