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Finding the Fourth Proportional to 18,766.38, 28,156.05 and 7,082.94

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Solution

The fourth proportional to 18,766.38, 28,156.05 and 7,082.94 is: 10,626.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,766.38 : 28,156.05 = 7,082.94 : x
  2. Step 2: Convert to fraction form
    18,766.38/28,156.05 = 7,082.94/x
  3. Step 3: Cross multiply
    18,766.38x = 28,156.05 × 7,082.94
  4. Step 4: Simplify right side
    18,766.38x = 199,427,612.79
  5. Step 5: Solve for x
    x = 199,427,612.79/18,766.38
  6. Step 6: Final answer
    x = 10,626.86

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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.