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Finding the Fourth Proportional to 18,793.39, 28,203.77 and 15,139.75

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Solution

The fourth proportional to 18,793.39, 28,203.77 and 15,139.75 is: 22,720.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.39 : 28,203.77 = 15,139.75 : x
  2. Step 2: Convert to fraction form
    18,793.39/28,203.77 = 15,139.75/x
  3. Step 3: Cross multiply
    18,793.39x = 28,203.77 × 15,139.75
  4. Step 4: Simplify right side
    18,793.39x = 426,998,026.86
  5. Step 5: Solve for x
    x = 426,998,026.86/18,793.39
  6. Step 6: Final answer
    x = 22,720.65

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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.