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Finding the Fourth Proportional to 18,777.96, 28,180.98 and 6,942.78

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Solution

The fourth proportional to 18,777.96, 28,180.98 and 6,942.78 is: 10,419.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.96 : 28,180.98 = 6,942.78 : x
  2. Step 2: Convert to fraction form
    18,777.96/28,180.98 = 6,942.78/x
  3. Step 3: Cross multiply
    18,777.96x = 28,180.98 × 6,942.78
  4. Step 4: Simplify right side
    18,777.96x = 195,654,344.32
  5. Step 5: Solve for x
    x = 195,654,344.32/18,777.96
  6. Step 6: Final answer
    x = 10,419.36

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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.