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Finding the Fourth Proportional to 19,226.80, 28,845.60 and 8,138.80

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Solution

The fourth proportional to 19,226.80, 28,845.60 and 8,138.80 is: 12,210.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,226.80 : 28,845.60 = 8,138.80 : x
  2. Step 2: Convert to fraction form
    19,226.80/28,845.60 = 8,138.80/x
  3. Step 3: Cross multiply
    19,226.80x = 28,845.60 × 8,138.80
  4. Step 4: Simplify right side
    19,226.80x = 234,768,569.28
  5. Step 5: Solve for x
    x = 234,768,569.28/19,226.80
  6. Step 6: Final answer
    x = 12,210.49

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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.