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Finding the Fourth Proportional to 20,310.88, 30,455 and 6,266.92

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Solution

The fourth proportional to 20,310.88, 30,455 and 6,266.92 is: 9,396.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,310.88 : 30,455 = 6,266.92 : x
  2. Step 2: Convert to fraction form
    20,310.88/30,455 = 6,266.92/x
  3. Step 3: Cross multiply
    20,310.88x = 30,455 × 6,266.92
  4. Step 4: Simplify right side
    20,310.88x = 190,859,048.60
  5. Step 5: Solve for x
    x = 190,859,048.60/20,310.88
  6. Step 6: Final answer
    x = 9,396.89

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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.