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Finding the Fourth Proportional to 18,793.47, 28,190.76 and 5,645.88

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Solution

The fourth proportional to 18,793.47, 28,190.76 and 5,645.88 is: 8,468.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.47 : 28,190.76 = 5,645.88 : x
  2. Step 2: Convert to fraction form
    18,793.47/28,190.76 = 5,645.88/x
  3. Step 3: Cross multiply
    18,793.47x = 28,190.76 × 5,645.88
  4. Step 4: Simplify right side
    18,793.47x = 159,161,648.07
  5. Step 5: Solve for x
    x = 159,161,648.07/18,793.47
  6. Step 6: Final answer
    x = 8,468.99

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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.