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Finding the Fourth Proportional to 20,211.99, 30,262.10 and 10,329.99

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Solution

The fourth proportional to 20,211.99, 30,262.10 and 10,329.99 is: 15,466.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.99 : 30,262.10 = 10,329.99 : x
  2. Step 2: Convert to fraction form
    20,211.99/30,262.10 = 10,329.99/x
  3. Step 3: Cross multiply
    20,211.99x = 30,262.10 × 10,329.99
  4. Step 4: Simplify right side
    20,211.99x = 312,607,138.73
  5. Step 5: Solve for x
    x = 312,607,138.73/20,211.99
  6. Step 6: Final answer
    x = 15,466.42

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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.