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Finding the Fourth Proportional to 18,421.67, 27,609.36 and 7,879.29

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Solution

The fourth proportional to 18,421.67, 27,609.36 and 7,879.29 is: 11,809.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,421.67 : 27,609.36 = 7,879.29 : x
  2. Step 2: Convert to fraction form
    18,421.67/27,609.36 = 7,879.29/x
  3. Step 3: Cross multiply
    18,421.67x = 27,609.36 × 7,879.29
  4. Step 4: Simplify right side
    18,421.67x = 217,542,154.15
  5. Step 5: Solve for x
    x = 217,542,154.15/18,421.67
  6. Step 6: Final answer
    x = 11,809.04

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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.