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Finding the Fourth Proportional to 11,706.80, 17,560.16 and 3,915.60

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Solution

The fourth proportional to 11,706.80, 17,560.16 and 3,915.60 is: 5,873.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,706.80 : 17,560.16 = 3,915.60 : x
  2. Step 2: Convert to fraction form
    11,706.80/17,560.16 = 3,915.60/x
  3. Step 3: Cross multiply
    11,706.80x = 17,560.16 × 3,915.60
  4. Step 4: Simplify right side
    11,706.80x = 68,758,562.50
  5. Step 5: Solve for x
    x = 68,758,562.50/11,706.80
  6. Step 6: Final answer
    x = 5,873.39

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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.