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Finding the Fourth Proportional to 18,775.53, 28,190.97 and 10,471.77

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Solution

The fourth proportional to 18,775.53, 28,190.97 and 10,471.77 is: 15,723.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,775.53 : 28,190.97 = 10,471.77 : x
  2. Step 2: Convert to fraction form
    18,775.53/28,190.97 = 10,471.77/x
  3. Step 3: Cross multiply
    18,775.53x = 28,190.97 × 10,471.77
  4. Step 4: Simplify right side
    18,775.53x = 295,209,353.92
  5. Step 5: Solve for x
    x = 295,209,353.92/18,775.53
  6. Step 6: Final answer
    x = 15,723.09

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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.