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Finding the Fourth Proportional to 21,192, 31,788 and 6,600

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Solution

The fourth proportional to 21,192, 31,788 and 6,600 is: 9,900

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,192 : 31,788 = 6,600 : x
  2. Step 2: Convert to fraction form
    21,192/31,788 = 6,600/x
  3. Step 3: Cross multiply
    21,192x = 31,788 × 6,600
  4. Step 4: Simplify right side
    21,192x = 209,800,800
  5. Step 5: Solve for x
    x = 209,800,800/21,192
  6. Step 6: Final answer
    x = 9,900

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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.