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Finding the Fourth Proportional to 18,531, 27,796.50 and 4,680

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Solution

The fourth proportional to 18,531, 27,796.50 and 4,680 is: 7,020

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,531 : 27,796.50 = 4,680 : x
  2. Step 2: Convert to fraction form
    18,531/27,796.50 = 4,680/x
  3. Step 3: Cross multiply
    18,531x = 27,796.50 × 4,680
  4. Step 4: Simplify right side
    18,531x = 130,087,620
  5. Step 5: Solve for x
    x = 130,087,620/18,531
  6. Step 6: Final answer
    x = 7,020

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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.