Home / 3,561.36-4,914.87-1,989.45

Finding the Fourth Proportional to 3,561.36, 4,914.87 and 1,989.45

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Solution

The fourth proportional to 3,561.36, 4,914.87 and 1,989.45 is: 2,745.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,561.36 : 4,914.87 = 1,989.45 : x
  2. Step 2: Convert to fraction form
    3,561.36/4,914.87 = 1,989.45/x
  3. Step 3: Cross multiply
    3,561.36x = 4,914.87 × 1,989.45
  4. Step 4: Simplify right side
    3,561.36x = 9,777,888.12
  5. Step 5: Solve for x
    x = 9,777,888.12/3,561.36
  6. Step 6: Final answer
    x = 2,745.55

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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.