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Finding the Fourth Proportional to 8,259.92, 12,389.78 and 2,019.99

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Solution

The fourth proportional to 8,259.92, 12,389.78 and 2,019.99 is: 3,029.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,259.92 : 12,389.78 = 2,019.99 : x
  2. Step 2: Convert to fraction form
    8,259.92/12,389.78 = 2,019.99/x
  3. Step 3: Cross multiply
    8,259.92x = 12,389.78 × 2,019.99
  4. Step 4: Simplify right side
    8,259.92x = 25,027,175.14
  5. Step 5: Solve for x
    x = 25,027,175.14/8,259.92
  6. Step 6: Final answer
    x = 3,029.95

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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.