Home / 3,859.90-5,321.21-2,740.43

Finding the Fourth Proportional to 3,859.90, 5,321.21 and 2,740.43

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Solution

The fourth proportional to 3,859.90, 5,321.21 and 2,740.43 is: 3,777.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.90 : 5,321.21 = 2,740.43 : x
  2. Step 2: Convert to fraction form
    3,859.90/5,321.21 = 2,740.43/x
  3. Step 3: Cross multiply
    3,859.90x = 5,321.21 × 2,740.43
  4. Step 4: Simplify right side
    3,859.90x = 14,582,403.52
  5. Step 5: Solve for x
    x = 14,582,403.52/3,859.90
  6. Step 6: Final answer
    x = 3,777.92

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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.