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Finding the Fourth Proportional to 18,770.64, 28,163.82 and 8,235.22

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Solution

The fourth proportional to 18,770.64, 28,163.82 and 8,235.22 is: 12,356.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,770.64 : 28,163.82 = 8,235.22 : x
  2. Step 2: Convert to fraction form
    18,770.64/28,163.82 = 8,235.22/x
  3. Step 3: Cross multiply
    18,770.64x = 28,163.82 × 8,235.22
  4. Step 4: Simplify right side
    18,770.64x = 231,935,253.74
  5. Step 5: Solve for x
    x = 231,935,253.74/18,770.64
  6. Step 6: Final answer
    x = 12,356.28

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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.