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Finding the Fourth Proportional to 20,192.90, 30,252.90 and 18,880.70

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Solution

The fourth proportional to 20,192.90, 30,252.90 and 18,880.70 is: 28,286.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,192.90 : 30,252.90 = 18,880.70 : x
  2. Step 2: Convert to fraction form
    20,192.90/30,252.90 = 18,880.70/x
  3. Step 3: Cross multiply
    20,192.90x = 30,252.90 × 18,880.70
  4. Step 4: Simplify right side
    20,192.90x = 571,195,929.03
  5. Step 5: Solve for x
    x = 571,195,929.03/20,192.90
  6. Step 6: Final answer
    x = 28,286.97

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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.