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Finding the Fourth Proportional to 20,383.67, 30,579.64 and 7,237.08

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Solution

The fourth proportional to 20,383.67, 30,579.64 and 7,237.08 is: 10,857.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.67 : 30,579.64 = 7,237.08 : x
  2. Step 2: Convert to fraction form
    20,383.67/30,579.64 = 7,237.08/x
  3. Step 3: Cross multiply
    20,383.67x = 30,579.64 × 7,237.08
  4. Step 4: Simplify right side
    20,383.67x = 221,307,282.96
  5. Step 5: Solve for x
    x = 221,307,282.96/20,383.67
  6. Step 6: Final answer
    x = 10,857.09

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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.