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Finding the Fourth Proportional to 11,869.14, 17,809.90 and 8,609.14

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Solution

The fourth proportional to 11,869.14, 17,809.90 and 8,609.14 is: 12,918.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,869.14 : 17,809.90 = 8,609.14 : x
  2. Step 2: Convert to fraction form
    11,869.14/17,809.90 = 8,609.14/x
  3. Step 3: Cross multiply
    11,869.14x = 17,809.90 × 8,609.14
  4. Step 4: Simplify right side
    11,869.14x = 153,327,879.44
  5. Step 5: Solve for x
    x = 153,327,879.44/11,869.14
  6. Step 6: Final answer
    x = 12,918.20

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1.5x scale

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.