Home / 2,161.12-3,236.80-1,293.60

Finding the Fourth Proportional to 2,161.12, 3,236.80 and 1,293.60

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Solution

The fourth proportional to 2,161.12, 3,236.80 and 1,293.60 is: 1,937.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.12 : 3,236.80 = 1,293.60 : x
  2. Step 2: Convert to fraction form
    2,161.12/3,236.80 = 1,293.60/x
  3. Step 3: Cross multiply
    2,161.12x = 3,236.80 × 1,293.60
  4. Step 4: Simplify right side
    2,161.12x = 4,187,124.48
  5. Step 5: Solve for x
    x = 4,187,124.48/2,161.12
  6. Step 6: Final answer
    x = 1,937.48

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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.