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Finding the Fourth Proportional to 18,966, 28,449 and 6,654

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Solution

The fourth proportional to 18,966, 28,449 and 6,654 is: 9,981

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,966 : 28,449 = 6,654 : x
  2. Step 2: Convert to fraction form
    18,966/28,449 = 6,654/x
  3. Step 3: Cross multiply
    18,966x = 28,449 × 6,654
  4. Step 4: Simplify right side
    18,966x = 189,299,646
  5. Step 5: Solve for x
    x = 189,299,646/18,966
  6. Step 6: Final answer
    x = 9,981

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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.