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Finding the Fourth Proportional to 18,410.78, 27,616.23 and 7,317.39

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Solution

The fourth proportional to 18,410.78, 27,616.23 and 7,317.39 is: 10,976.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,410.78 : 27,616.23 = 7,317.39 : x
  2. Step 2: Convert to fraction form
    18,410.78/27,616.23 = 7,317.39/x
  3. Step 3: Cross multiply
    18,410.78x = 27,616.23 × 7,317.39
  4. Step 4: Simplify right side
    18,410.78x = 202,078,837.93
  5. Step 5: Solve for x
    x = 202,078,837.93/18,410.78
  6. Step 6: Final answer
    x = 10,976.11

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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.