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Finding the Fourth Proportional to 21,791.62, 30,062.43 and 12,834.83

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Solution

The fourth proportional to 21,791.62, 30,062.43 and 12,834.83 is: 17,706.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,791.62 : 30,062.43 = 12,834.83 : x
  2. Step 2: Convert to fraction form
    21,791.62/30,062.43 = 12,834.83/x
  3. Step 3: Cross multiply
    21,791.62x = 30,062.43 × 12,834.83
  4. Step 4: Simplify right side
    21,791.62x = 385,846,178.44
  5. Step 5: Solve for x
    x = 385,846,178.44/21,791.62
  6. Step 6: Final answer
    x = 17,706.17

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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.