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Finding the Fourth Proportional to 7,870, 11,805 and 2,398

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Solution

The fourth proportional to 7,870, 11,805 and 2,398 is: 3,597

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,870 : 11,805 = 2,398 : x
  2. Step 2: Convert to fraction form
    7,870/11,805 = 2,398/x
  3. Step 3: Cross multiply
    7,870x = 11,805 × 2,398
  4. Step 4: Simplify right side
    7,870x = 28,308,390
  5. Step 5: Solve for x
    x = 28,308,390/7,870
  6. Step 6: Final answer
    x = 3,597

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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.