Home / 2,129.11-3,195.21-1,089.98

Finding the Fourth Proportional to 2,129.11, 3,195.21 and 1,089.98

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Solution

The fourth proportional to 2,129.11, 3,195.21 and 1,089.98 is: 1,635.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.11 : 3,195.21 = 1,089.98 : x
  2. Step 2: Convert to fraction form
    2,129.11/3,195.21 = 1,089.98/x
  3. Step 3: Cross multiply
    2,129.11x = 3,195.21 × 1,089.98
  4. Step 4: Simplify right side
    2,129.11x = 3,482,715.09
  5. Step 5: Solve for x
    x = 3,482,715.09/2,129.11
  6. Step 6: Final answer
    x = 1,635.76

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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.