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Finding the Fourth Proportional to 18,878.28, 28,310.94 and 7,194.84

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Solution

The fourth proportional to 18,878.28, 28,310.94 and 7,194.84 is: 10,789.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.28 : 28,310.94 = 7,194.84 : x
  2. Step 2: Convert to fraction form
    18,878.28/28,310.94 = 7,194.84/x
  3. Step 3: Cross multiply
    18,878.28x = 28,310.94 × 7,194.84
  4. Step 4: Simplify right side
    18,878.28x = 203,692,683.55
  5. Step 5: Solve for x
    x = 203,692,683.55/18,878.28
  6. Step 6: Final answer
    x = 10,789.79

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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.