Home / 2,161.38-3,239.31-1,381.08

Finding the Fourth Proportional to 2,161.38, 3,239.31 and 1,381.08

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Solution

The fourth proportional to 2,161.38, 3,239.31 and 1,381.08 is: 2,069.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.38 : 3,239.31 = 1,381.08 : x
  2. Step 2: Convert to fraction form
    2,161.38/3,239.31 = 1,381.08/x
  3. Step 3: Cross multiply
    2,161.38x = 3,239.31 × 1,381.08
  4. Step 4: Simplify right side
    2,161.38x = 4,473,746.25
  5. Step 5: Solve for x
    x = 4,473,746.25/2,161.38
  6. Step 6: Final answer
    x = 2,069.86

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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.