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Finding the Fourth Proportional to 18,654.74, 27,991.84 and 8,264.06

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Solution

The fourth proportional to 18,654.74, 27,991.84 and 8,264.06 is: 12,400.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,654.74 : 27,991.84 = 8,264.06 : x
  2. Step 2: Convert to fraction form
    18,654.74/27,991.84 = 8,264.06/x
  3. Step 3: Cross multiply
    18,654.74x = 27,991.84 × 8,264.06
  4. Step 4: Simplify right side
    18,654.74x = 231,326,294.59
  5. Step 5: Solve for x
    x = 231,326,294.59/18,654.74
  6. Step 6: Final answer
    x = 12,400.40

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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.