Home / 3,915.62-5,403.60-2,147.42

Finding the Fourth Proportional to 3,915.62, 5,403.60 and 2,147.42

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Solution

The fourth proportional to 3,915.62, 5,403.60 and 2,147.42 is: 2,963.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.62 : 5,403.60 = 2,147.42 : x
  2. Step 2: Convert to fraction form
    3,915.62/5,403.60 = 2,147.42/x
  3. Step 3: Cross multiply
    3,915.62x = 5,403.60 × 2,147.42
  4. Step 4: Simplify right side
    3,915.62x = 11,603,798.71
  5. Step 5: Solve for x
    x = 11,603,798.71/3,915.62
  6. Step 6: Final answer
    x = 2,963.46

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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.