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Finding the Fourth Proportional to 20,626.78, 30,935.22 and 9,522.80

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Solution

The fourth proportional to 20,626.78, 30,935.22 and 9,522.80 is: 14,281.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,626.78 : 30,935.22 = 9,522.80 : x
  2. Step 2: Convert to fraction form
    20,626.78/30,935.22 = 9,522.80/x
  3. Step 3: Cross multiply
    20,626.78x = 30,935.22 × 9,522.80
  4. Step 4: Simplify right side
    20,626.78x = 294,589,915.97
  5. Step 5: Solve for x
    x = 294,589,915.97/20,626.78
  6. Step 6: Final answer
    x = 14,281.91

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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.