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Finding the Fourth Proportional to 18,919.10, 26,099.58 and 12,206.87

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Solution

The fourth proportional to 18,919.10, 26,099.58 and 12,206.87 is: 16,839.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.10 : 26,099.58 = 12,206.87 : x
  2. Step 2: Convert to fraction form
    18,919.10/26,099.58 = 12,206.87/x
  3. Step 3: Cross multiply
    18,919.10x = 26,099.58 × 12,206.87
  4. Step 4: Simplify right side
    18,919.10x = 318,594,193.27
  5. Step 5: Solve for x
    x = 318,594,193.27/18,919.10
  6. Step 6: Final answer
    x = 16,839.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.