Home / 3,915.41-5,403.38-2,147.14

Finding the Fourth Proportional to 3,915.41, 5,403.38 and 2,147.14

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Solution

The fourth proportional to 3,915.41, 5,403.38 and 2,147.14 is: 2,963.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.41 : 5,403.38 = 2,147.14 : x
  2. Step 2: Convert to fraction form
    3,915.41/5,403.38 = 2,147.14/x
  3. Step 3: Cross multiply
    3,915.41x = 5,403.38 × 2,147.14
  4. Step 4: Simplify right side
    3,915.41x = 11,601,775.58
  5. Step 5: Solve for x
    x = 11,601,775.58/3,915.41
  6. Step 6: Final answer
    x = 2,963.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.