Home / 3,915.69-5,403.99-2,147.64

Finding the Fourth Proportional to 3,915.69, 5,403.99 and 2,147.64

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Solution

The fourth proportional to 3,915.69, 5,403.99 and 2,147.64 is: 2,963.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.69 : 5,403.99 = 2,147.64 : x
  2. Step 2: Convert to fraction form
    3,915.69/5,403.99 = 2,147.64/x
  3. Step 3: Cross multiply
    3,915.69x = 5,403.99 × 2,147.64
  4. Step 4: Simplify right side
    3,915.69x = 11,605,825.08
  5. Step 5: Solve for x
    x = 11,605,825.08/3,915.69
  6. Step 6: Final answer
    x = 2,963.93

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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.