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Finding the Fourth Proportional to 18,919.26, 26,103.33 and 12,205.17

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Solution

The fourth proportional to 18,919.26, 26,103.33 and 12,205.17 is: 16,839.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.26 : 26,103.33 = 12,205.17 : x
  2. Step 2: Convert to fraction form
    18,919.26/26,103.33 = 12,205.17/x
  3. Step 3: Cross multiply
    18,919.26x = 26,103.33 × 12,205.17
  4. Step 4: Simplify right side
    18,919.26x = 318,595,580.22
  5. Step 5: Solve for x
    x = 318,595,580.22/18,919.26
  6. Step 6: Final answer
    x = 16,839.75

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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.