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Finding the Fourth Proportional to 20,609.15, 30,917.57 and 9,365.28

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Solution

The fourth proportional to 20,609.15, 30,917.57 and 9,365.28 is: 14,049.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,609.15 : 30,917.57 = 9,365.28 : x
  2. Step 2: Convert to fraction form
    20,609.15/30,917.57 = 9,365.28/x
  3. Step 3: Cross multiply
    20,609.15x = 30,917.57 × 9,365.28
  4. Step 4: Simplify right side
    20,609.15x = 289,551,653.14
  5. Step 5: Solve for x
    x = 289,551,653.14/20,609.15
  6. Step 6: Final answer
    x = 14,049.67

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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.