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Finding the Fourth Proportional to 21,620, 32,430 and 5,204

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Solution

The fourth proportional to 21,620, 32,430 and 5,204 is: 7,806

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620 : 32,430 = 5,204 : x
  2. Step 2: Convert to fraction form
    21,620/32,430 = 5,204/x
  3. Step 3: Cross multiply
    21,620x = 32,430 × 5,204
  4. Step 4: Simplify right side
    21,620x = 168,765,720
  5. Step 5: Solve for x
    x = 168,765,720/21,620
  6. Step 6: Final answer
    x = 7,806

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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.