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Finding the Fourth Proportional to 20,609.39, 30,921.11 and 8,762.67

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Solution

The fourth proportional to 20,609.39, 30,921.11 and 8,762.67 is: 13,146.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,609.39 : 30,921.11 = 8,762.67 : x
  2. Step 2: Convert to fraction form
    20,609.39/30,921.11 = 8,762.67/x
  3. Step 3: Cross multiply
    20,609.39x = 30,921.11 × 8,762.67
  4. Step 4: Simplify right side
    20,609.39x = 270,951,439.15
  5. Step 5: Solve for x
    x = 270,951,439.15/20,609.39
  6. Step 6: Final answer
    x = 13,146.99

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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.