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Finding the Fourth Proportional to 22,908.78, 31,616.06 and 12,837.11

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Solution

The fourth proportional to 22,908.78, 31,616.06 and 12,837.11 is: 17,716.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,908.78 : 31,616.06 = 12,837.11 : x
  2. Step 2: Convert to fraction form
    22,908.78/31,616.06 = 12,837.11/x
  3. Step 3: Cross multiply
    22,908.78x = 31,616.06 × 12,837.11
  4. Step 4: Simplify right side
    22,908.78x = 405,858,617.72
  5. Step 5: Solve for x
    x = 405,858,617.72/22,908.78
  6. Step 6: Final answer
    x = 17,716.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.