Home / 2,116.09-3,170.70-1,291.87

Finding the Fourth Proportional to 2,116.09, 3,170.70 and 1,291.87

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Solution

The fourth proportional to 2,116.09, 3,170.70 and 1,291.87 is: 1,935.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.09 : 3,170.70 = 1,291.87 : x
  2. Step 2: Convert to fraction form
    2,116.09/3,170.70 = 1,291.87/x
  3. Step 3: Cross multiply
    2,116.09x = 3,170.70 × 1,291.87
  4. Step 4: Simplify right side
    2,116.09x = 4,096,132.21
  5. Step 5: Solve for x
    x = 4,096,132.21/2,116.09
  6. Step 6: Final answer
    x = 1,935.71

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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.