Home / 2,157.89-3,236.83-1,427.31

Finding the Fourth Proportional to 2,157.89, 3,236.83 and 1,427.31

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Solution

The fourth proportional to 2,157.89, 3,236.83 and 1,427.31 is: 2,140.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.89 : 3,236.83 = 1,427.31 : x
  2. Step 2: Convert to fraction form
    2,157.89/3,236.83 = 1,427.31/x
  3. Step 3: Cross multiply
    2,157.89x = 3,236.83 × 1,427.31
  4. Step 4: Simplify right side
    2,157.89x = 4,619,956.26
  5. Step 5: Solve for x
    x = 4,619,956.26/2,157.89
  6. Step 6: Final answer
    x = 2,140.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.