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Finding the Fourth Proportional to 11,389.78, 17,084.78 and 3,994.41

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Solution

The fourth proportional to 11,389.78, 17,084.78 and 3,994.41 is: 5,991.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,389.78 : 17,084.78 = 3,994.41 : x
  2. Step 2: Convert to fraction form
    11,389.78/17,084.78 = 3,994.41/x
  3. Step 3: Cross multiply
    11,389.78x = 17,084.78 × 3,994.41
  4. Step 4: Simplify right side
    11,389.78x = 68,243,675.15
  5. Step 5: Solve for x
    x = 68,243,675.15/11,389.78
  6. Step 6: Final answer
    x = 5,991.66

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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.