Home / 2,121.93-3,181.35-1,426.87

Finding the Fourth Proportional to 2,121.93, 3,181.35 and 1,426.87

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Solution

The fourth proportional to 2,121.93, 3,181.35 and 1,426.87 is: 2,139.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.93 : 3,181.35 = 1,426.87 : x
  2. Step 2: Convert to fraction form
    2,121.93/3,181.35 = 1,426.87/x
  3. Step 3: Cross multiply
    2,121.93x = 3,181.35 × 1,426.87
  4. Step 4: Simplify right side
    2,121.93x = 4,539,372.87
  5. Step 5: Solve for x
    x = 4,539,372.87/2,121.93
  6. Step 6: Final answer
    x = 2,139.27

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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.