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Finding the Fourth Proportional to 20,495.80, 30,743.70 and 14,620.60

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Solution

The fourth proportional to 20,495.80, 30,743.70 and 14,620.60 is: 21,930.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,495.80 : 30,743.70 = 14,620.60 : x
  2. Step 2: Convert to fraction form
    20,495.80/30,743.70 = 14,620.60/x
  3. Step 3: Cross multiply
    20,495.80x = 30,743.70 × 14,620.60
  4. Step 4: Simplify right side
    20,495.80x = 449,491,340.22
  5. Step 5: Solve for x
    x = 449,491,340.22/20,495.80
  6. Step 6: Final answer
    x = 21,930.90

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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.