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Finding the Fourth Proportional to 8,135.49, 12,222.68 and 5,219.49

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Solution

The fourth proportional to 8,135.49, 12,222.68 and 5,219.49 is: 7,841.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,135.49 : 12,222.68 = 5,219.49 : x
  2. Step 2: Convert to fraction form
    8,135.49/12,222.68 = 5,219.49/x
  3. Step 3: Cross multiply
    8,135.49x = 12,222.68 × 5,219.49
  4. Step 4: Simplify right side
    8,135.49x = 63,796,129.94
  5. Step 5: Solve for x
    x = 63,796,129.94/8,135.49
  6. Step 6: Final answer
    x = 7,841.71

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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.