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Finding the Fourth Proportional to 20,600.33, 30,900.49 and 7,450.99

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Solution

The fourth proportional to 20,600.33, 30,900.49 and 7,450.99 is: 11,176.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,600.33 : 30,900.49 = 7,450.99 : x
  2. Step 2: Convert to fraction form
    20,600.33/30,900.49 = 7,450.99/x
  3. Step 3: Cross multiply
    20,600.33x = 30,900.49 × 7,450.99
  4. Step 4: Simplify right side
    20,600.33x = 230,239,146.11
  5. Step 5: Solve for x
    x = 230,239,146.11/20,600.33
  6. Step 6: Final answer
    x = 11,176.48

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Double scale
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Similar ratio
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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.