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Finding the Fourth Proportional to 20,003, 30,005.98 and 7,691

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Solution

The fourth proportional to 20,003, 30,005.98 and 7,691 is: 11,537.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,003 : 30,005.98 = 7,691 : x
  2. Step 2: Convert to fraction form
    20,003/30,005.98 = 7,691/x
  3. Step 3: Cross multiply
    20,003x = 30,005.98 × 7,691
  4. Step 4: Simplify right side
    20,003x = 230,775,992.18
  5. Step 5: Solve for x
    x = 230,775,992.18/20,003
  6. Step 6: Final answer
    x = 11,537.07

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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.