Home / 2,130.81-3,195.80-1,091.37

Finding the Fourth Proportional to 2,130.81, 3,195.80 and 1,091.37

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Solution

The fourth proportional to 2,130.81, 3,195.80 and 1,091.37 is: 1,636.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.81 : 3,195.80 = 1,091.37 : x
  2. Step 2: Convert to fraction form
    2,130.81/3,195.80 = 1,091.37/x
  3. Step 3: Cross multiply
    2,130.81x = 3,195.80 × 1,091.37
  4. Step 4: Simplify right side
    2,130.81x = 3,487,794.79
  5. Step 5: Solve for x
    x = 3,487,794.79/2,130.81
  6. Step 6: Final answer
    x = 1,636.84

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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.