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Finding the Fourth Proportional to 6,878, 10,318.80 and 2,261

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Solution

The fourth proportional to 6,878, 10,318.80 and 2,261 is: 3,392.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,878 : 10,318.80 = 2,261 : x
  2. Step 2: Convert to fraction form
    6,878/10,318.80 = 2,261/x
  3. Step 3: Cross multiply
    6,878x = 10,318.80 × 2,261
  4. Step 4: Simplify right side
    6,878x = 23,330,806.80
  5. Step 5: Solve for x
    x = 23,330,806.80/6,878
  6. Step 6: Final answer
    x = 3,392.09

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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.