Home / 3,678.28-5,076.12-1,999.80

Finding the Fourth Proportional to 3,678.28, 5,076.12 and 1,999.80

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Solution

The fourth proportional to 3,678.28, 5,076.12 and 1,999.80 is: 2,759.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.28 : 5,076.12 = 1,999.80 : x
  2. Step 2: Convert to fraction form
    3,678.28/5,076.12 = 1,999.80/x
  3. Step 3: Cross multiply
    3,678.28x = 5,076.12 × 1,999.80
  4. Step 4: Simplify right side
    3,678.28x = 10,151,220.38
  5. Step 5: Solve for x
    x = 10,151,220.38/3,678.28
  6. Step 6: Final answer
    x = 2,759.78

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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.