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Finding the Fourth Proportional to 6,611.34, 9,918.36 and 2,715.78

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Solution

The fourth proportional to 6,611.34, 9,918.36 and 2,715.78 is: 4,074.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,611.34 : 9,918.36 = 2,715.78 : x
  2. Step 2: Convert to fraction form
    6,611.34/9,918.36 = 2,715.78/x
  3. Step 3: Cross multiply
    6,611.34x = 9,918.36 × 2,715.78
  4. Step 4: Simplify right side
    6,611.34x = 26,936,083.72
  5. Step 5: Solve for x
    x = 26,936,083.72/6,611.34
  6. Step 6: Final answer
    x = 4,074.22

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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.