Home / 3,915.86-5,403.93-2,147.48

Finding the Fourth Proportional to 3,915.86, 5,403.93 and 2,147.48

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Solution

The fourth proportional to 3,915.86, 5,403.93 and 2,147.48 is: 2,963.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.86 : 5,403.93 = 2,147.48 : x
  2. Step 2: Convert to fraction form
    3,915.86/5,403.93 = 2,147.48/x
  3. Step 3: Cross multiply
    3,915.86x = 5,403.93 × 2,147.48
  4. Step 4: Simplify right side
    3,915.86x = 11,604,816.79
  5. Step 5: Solve for x
    x = 11,604,816.79/3,915.86
  6. Step 6: Final answer
    x = 2,963.55

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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.