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Finding the Fourth Proportional to 20,161.20, 30,252.60 and 9,069.60

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Solution

The fourth proportional to 20,161.20, 30,252.60 and 9,069.60 is: 13,609.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,161.20 : 30,252.60 = 9,069.60 : x
  2. Step 2: Convert to fraction form
    20,161.20/30,252.60 = 9,069.60/x
  3. Step 3: Cross multiply
    20,161.20x = 30,252.60 × 9,069.60
  4. Step 4: Simplify right side
    20,161.20x = 274,378,980.96
  5. Step 5: Solve for x
    x = 274,378,980.96/20,161.20
  6. Step 6: Final answer
    x = 13,609.26

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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.