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Finding the Fourth Proportional to 18,669.78, 27,940.23 and 11,551.09

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Solution

The fourth proportional to 18,669.78, 27,940.23 and 11,551.09 is: 17,286.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,669.78 : 27,940.23 = 11,551.09 : x
  2. Step 2: Convert to fraction form
    18,669.78/27,940.23 = 11,551.09/x
  3. Step 3: Cross multiply
    18,669.78x = 27,940.23 × 11,551.09
  4. Step 4: Simplify right side
    18,669.78x = 322,740,111.35
  5. Step 5: Solve for x
    x = 322,740,111.35/18,669.78
  6. Step 6: Final answer
    x = 17,286.77

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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.