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Finding the Fourth Proportional to 18,775.56, 28,163.34 and 5,627.64

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Solution

The fourth proportional to 18,775.56, 28,163.34 and 5,627.64 is: 8,441.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,775.56 : 28,163.34 = 5,627.64 : x
  2. Step 2: Convert to fraction form
    18,775.56/28,163.34 = 5,627.64/x
  3. Step 3: Cross multiply
    18,775.56x = 28,163.34 × 5,627.64
  4. Step 4: Simplify right side
    18,775.56x = 158,493,138.72
  5. Step 5: Solve for x
    x = 158,493,138.72/18,775.56
  6. Step 6: Final answer
    x = 8,441.46

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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.