Home / 3,812.80-5,261.78-2,134.16

Finding the Fourth Proportional to 3,812.80, 5,261.78 and 2,134.16

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Solution

The fourth proportional to 3,812.80, 5,261.78 and 2,134.16 is: 2,945.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,812.80 : 5,261.78 = 2,134.16 : x
  2. Step 2: Convert to fraction form
    3,812.80/5,261.78 = 2,134.16/x
  3. Step 3: Cross multiply
    3,812.80x = 5,261.78 × 2,134.16
  4. Step 4: Simplify right side
    3,812.80x = 11,229,480.40
  5. Step 5: Solve for x
    x = 11,229,480.40/3,812.80
  6. Step 6: Final answer
    x = 2,945.21

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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.