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Finding the Fourth Proportional to 18,108.92, 27,173.97 and 7,578.06

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Solution

The fourth proportional to 18,108.92, 27,173.97 and 7,578.06 is: 11,371.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,108.92 : 27,173.97 = 7,578.06 : x
  2. Step 2: Convert to fraction form
    18,108.92/27,173.97 = 7,578.06/x
  3. Step 3: Cross multiply
    18,108.92x = 27,173.97 × 7,578.06
  4. Step 4: Simplify right side
    18,108.92x = 205,925,975.10
  5. Step 5: Solve for x
    x = 205,925,975.10/18,108.92
  6. Step 6: Final answer
    x = 11,371.52

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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.