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Finding the Fourth Proportional to 13,489.50, 18,609.96 and 8,954.31

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Solution

The fourth proportional to 13,489.50, 18,609.96 and 8,954.31 is: 12,353.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.50 : 18,609.96 = 8,954.31 : x
  2. Step 2: Convert to fraction form
    13,489.50/18,609.96 = 8,954.31/x
  3. Step 3: Cross multiply
    13,489.50x = 18,609.96 × 8,954.31
  4. Step 4: Simplify right side
    13,489.50x = 166,639,350.93
  5. Step 5: Solve for x
    x = 166,639,350.93/13,489.50
  6. Step 6: Final answer
    x = 12,353.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.