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Finding the Fourth Proportional to 18,793.80, 28,197.90 and 18,498.60

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Solution

The fourth proportional to 18,793.80, 28,197.90 and 18,498.60 is: 27,754.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.80 : 28,197.90 = 18,498.60 : x
  2. Step 2: Convert to fraction form
    18,793.80/28,197.90 = 18,498.60/x
  3. Step 3: Cross multiply
    18,793.80x = 28,197.90 × 18,498.60
  4. Step 4: Simplify right side
    18,793.80x = 521,621,672.94
  5. Step 5: Solve for x
    x = 521,621,672.94/18,793.80
  6. Step 6: Final answer
    x = 27,754.99

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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.