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Finding the Fourth Proportional to 20,599.20, 30,898.80 and 20,469.60

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Solution

The fourth proportional to 20,599.20, 30,898.80 and 20,469.60 is: 30,704.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,599.20 : 30,898.80 = 20,469.60 : x
  2. Step 2: Convert to fraction form
    20,599.20/30,898.80 = 20,469.60/x
  3. Step 3: Cross multiply
    20,599.20x = 30,898.80 × 20,469.60
  4. Step 4: Simplify right side
    20,599.20x = 632,486,076.48
  5. Step 5: Solve for x
    x = 632,486,076.48/20,599.20
  6. Step 6: Final answer
    x = 30,704.40

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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.