Home / 2,101.80-3,155.10-1,236.60

Finding the Fourth Proportional to 2,101.80, 3,155.10 and 1,236.60

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Solution

The fourth proportional to 2,101.80, 3,155.10 and 1,236.60 is: 1,856.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.80 : 3,155.10 = 1,236.60 : x
  2. Step 2: Convert to fraction form
    2,101.80/3,155.10 = 1,236.60/x
  3. Step 3: Cross multiply
    2,101.80x = 3,155.10 × 1,236.60
  4. Step 4: Simplify right side
    2,101.80x = 3,901,596.66
  5. Step 5: Solve for x
    x = 3,901,596.66/2,101.80
  6. Step 6: Final answer
    x = 1,856.31

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1.5x scale

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.