Home / 2,187.20-3,272.16-1,997.12

Finding the Fourth Proportional to 2,187.20, 3,272.16 and 1,997.12

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Solution

The fourth proportional to 2,187.20, 3,272.16 and 1,997.12 is: 2,987.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.20 : 3,272.16 = 1,997.12 : x
  2. Step 2: Convert to fraction form
    2,187.20/3,272.16 = 1,997.12/x
  3. Step 3: Cross multiply
    2,187.20x = 3,272.16 × 1,997.12
  4. Step 4: Simplify right side
    2,187.20x = 6,534,896.18
  5. Step 5: Solve for x
    x = 6,534,896.18/2,187.20
  6. Step 6: Final answer
    x = 2,987.79

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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.