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Finding the Fourth Proportional to 18,865.39, 28,299.03 and 7,179.52

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Solution

The fourth proportional to 18,865.39, 28,299.03 and 7,179.52 is: 10,769.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.39 : 28,299.03 = 7,179.52 : x
  2. Step 2: Convert to fraction form
    18,865.39/28,299.03 = 7,179.52/x
  3. Step 3: Cross multiply
    18,865.39x = 28,299.03 × 7,179.52
  4. Step 4: Simplify right side
    18,865.39x = 203,173,451.87
  5. Step 5: Solve for x
    x = 203,173,451.87/18,865.39
  6. Step 6: Final answer
    x = 10,769.64

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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.