Home / 2,109.30-3,163.95-1,125.15

Finding the Fourth Proportional to 2,109.30, 3,163.95 and 1,125.15

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Solution

The fourth proportional to 2,109.30, 3,163.95 and 1,125.15 is: 1,687.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,109.30 : 3,163.95 = 1,125.15 : x
  2. Step 2: Convert to fraction form
    2,109.30/3,163.95 = 1,125.15/x
  3. Step 3: Cross multiply
    2,109.30x = 3,163.95 × 1,125.15
  4. Step 4: Simplify right side
    2,109.30x = 3,559,918.34
  5. Step 5: Solve for x
    x = 3,559,918.34/2,109.30
  6. Step 6: Final answer
    x = 1,687.73

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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.