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Finding the Fourth Proportional to 3,968.12, 5,938.92 and 3,915.68

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Solution

The fourth proportional to 3,968.12, 5,938.92 and 3,915.68 is: 5,860.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,968.12 : 5,938.92 = 3,915.68 : x
  2. Step 2: Convert to fraction form
    3,968.12/5,938.92 = 3,915.68/x
  3. Step 3: Cross multiply
    3,968.12x = 5,938.92 × 3,915.68
  4. Step 4: Simplify right side
    3,968.12x = 23,254,880.57
  5. Step 5: Solve for x
    x = 23,254,880.57/3,968.12
  6. Step 6: Final answer
    x = 5,860.42

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1.5x scale

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.