Home / 2,111.22-3,165.30-1,381.20

Finding the Fourth Proportional to 2,111.22, 3,165.30 and 1,381.20

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Solution

The fourth proportional to 2,111.22, 3,165.30 and 1,381.20 is: 2,070.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,111.22 : 3,165.30 = 1,381.20 : x
  2. Step 2: Convert to fraction form
    2,111.22/3,165.30 = 1,381.20/x
  3. Step 3: Cross multiply
    2,111.22x = 3,165.30 × 1,381.20
  4. Step 4: Simplify right side
    2,111.22x = 4,371,912.36
  5. Step 5: Solve for x
    x = 4,371,912.36/2,111.22
  6. Step 6: Final answer
    x = 2,070.80

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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.