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Finding the Fourth Proportional to 12,395.78, 18,571.10 and 11,067.18

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Solution

The fourth proportional to 12,395.78, 18,571.10 and 11,067.18 is: 16,580.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,395.78 : 18,571.10 = 11,067.18 : x
  2. Step 2: Convert to fraction form
    12,395.78/18,571.10 = 11,067.18/x
  3. Step 3: Cross multiply
    12,395.78x = 18,571.10 × 11,067.18
  4. Step 4: Simplify right side
    12,395.78x = 205,529,706.50
  5. Step 5: Solve for x
    x = 205,529,706.50/12,395.78
  6. Step 6: Final answer
    x = 16,580.62

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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.