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Finding the Fourth Proportional to 20,422.20, 30,657.60 and 11,544.60

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Solution

The fourth proportional to 20,422.20, 30,657.60 and 11,544.60 is: 17,330.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.20 : 30,657.60 = 11,544.60 : x
  2. Step 2: Convert to fraction form
    20,422.20/30,657.60 = 11,544.60/x
  3. Step 3: Cross multiply
    20,422.20x = 30,657.60 × 11,544.60
  4. Step 4: Simplify right side
    20,422.20x = 353,929,728.96
  5. Step 5: Solve for x
    x = 353,929,728.96/20,422.20
  6. Step 6: Final answer
    x = 17,330.64

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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.