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Finding the Fourth Proportional to 18,770.86, 28,147.65 and 7,076.62

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Solution

The fourth proportional to 18,770.86, 28,147.65 and 7,076.62 is: 10,611.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,770.86 : 28,147.65 = 7,076.62 : x
  2. Step 2: Convert to fraction form
    18,770.86/28,147.65 = 7,076.62/x
  3. Step 3: Cross multiply
    18,770.86x = 28,147.65 × 7,076.62
  4. Step 4: Simplify right side
    18,770.86x = 199,190,222.94
  5. Step 5: Solve for x
    x = 199,190,222.94/18,770.86
  6. Step 6: Final answer
    x = 10,611.67

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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.