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Finding the Fourth Proportional to 20,603.88, 30,906.30 and 7,449.96

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Solution

The fourth proportional to 20,603.88, 30,906.30 and 7,449.96 is: 11,175.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.88 : 30,906.30 = 7,449.96 : x
  2. Step 2: Convert to fraction form
    20,603.88/30,906.30 = 7,449.96/x
  3. Step 3: Cross multiply
    20,603.88x = 30,906.30 × 7,449.96
  4. Step 4: Simplify right side
    20,603.88x = 230,250,698.75
  5. Step 5: Solve for x
    x = 230,250,698.75/20,603.88
  6. Step 6: Final answer
    x = 11,175.11

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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.