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Finding the Fourth Proportional to 12,911.11, 17,822.79 and 8,725.03

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Solution

The fourth proportional to 12,911.11, 17,822.79 and 8,725.03 is: 12,044.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.11 : 17,822.79 = 8,725.03 : x
  2. Step 2: Convert to fraction form
    12,911.11/17,822.79 = 8,725.03/x
  3. Step 3: Cross multiply
    12,911.11x = 17,822.79 × 8,725.03
  4. Step 4: Simplify right side
    12,911.11x = 155,504,377.43
  5. Step 5: Solve for x
    x = 155,504,377.43/12,911.11
  6. Step 6: Final answer
    x = 12,044.23

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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.