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Finding the Fourth Proportional to 20,079.70, 30,123.15 and 8,394.10

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Solution

The fourth proportional to 20,079.70, 30,123.15 and 8,394.10 is: 12,592.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.70 : 30,123.15 = 8,394.10 : x
  2. Step 2: Convert to fraction form
    20,079.70/30,123.15 = 8,394.10/x
  3. Step 3: Cross multiply
    20,079.70x = 30,123.15 × 8,394.10
  4. Step 4: Simplify right side
    20,079.70x = 252,856,733.42
  5. Step 5: Solve for x
    x = 252,856,733.42/20,079.70
  6. Step 6: Final answer
    x = 12,592.65

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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.