Home / 3,561.38-4,914.70-1,989.51

Finding the Fourth Proportional to 3,561.38, 4,914.70 and 1,989.51

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Solution

The fourth proportional to 3,561.38, 4,914.70 and 1,989.51 is: 2,745.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,561.38 : 4,914.70 = 1,989.51 : x
  2. Step 2: Convert to fraction form
    3,561.38/4,914.70 = 1,989.51/x
  3. Step 3: Cross multiply
    3,561.38x = 4,914.70 × 1,989.51
  4. Step 4: Simplify right side
    3,561.38x = 9,777,820.22
  5. Step 5: Solve for x
    x = 9,777,820.22/3,561.38
  6. Step 6: Final answer
    x = 2,745.52

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Half scale
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Double scale
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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.