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Finding the Fourth Proportional to 21,662.73, 29,894.13 and 12,231.09

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Solution

The fourth proportional to 21,662.73, 29,894.13 and 12,231.09 is: 16,878.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,662.73 : 29,894.13 = 12,231.09 : x
  2. Step 2: Convert to fraction form
    21,662.73/29,894.13 = 12,231.09/x
  3. Step 3: Cross multiply
    21,662.73x = 29,894.13 × 12,231.09
  4. Step 4: Simplify right side
    21,662.73x = 365,637,794.50
  5. Step 5: Solve for x
    x = 365,637,794.50/21,662.73
  6. Step 6: Final answer
    x = 16,878.66

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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.