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Finding the Fourth Proportional to 20,303.80, 30,469.30 and 7,156.20

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Solution

The fourth proportional to 20,303.80, 30,469.30 and 7,156.20 is: 10,739.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,303.80 : 30,469.30 = 7,156.20 : x
  2. Step 2: Convert to fraction form
    20,303.80/30,469.30 = 7,156.20/x
  3. Step 3: Cross multiply
    20,303.80x = 30,469.30 × 7,156.20
  4. Step 4: Simplify right side
    20,303.80x = 218,044,404.66
  5. Step 5: Solve for x
    x = 218,044,404.66/20,303.80
  6. Step 6: Final answer
    x = 10,739.09

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.