Home / 2,126.21-3,189.76-1,072.62

Finding the Fourth Proportional to 2,126.21, 3,189.76 and 1,072.62

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Solution

The fourth proportional to 2,126.21, 3,189.76 and 1,072.62 is: 1,609.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.21 : 3,189.76 = 1,072.62 : x
  2. Step 2: Convert to fraction form
    2,126.21/3,189.76 = 1,072.62/x
  3. Step 3: Cross multiply
    2,126.21x = 3,189.76 × 1,072.62
  4. Step 4: Simplify right side
    2,126.21x = 3,421,397.69
  5. Step 5: Solve for x
    x = 3,421,397.69/2,126.21
  6. Step 6: Final answer
    x = 1,609.16

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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.