Home / 2,129.06-3,187.64-1,086.80

Finding the Fourth Proportional to 2,129.06, 3,187.64 and 1,086.80

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Solution

The fourth proportional to 2,129.06, 3,187.64 and 1,086.80 is: 1,627.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.06 : 3,187.64 = 1,086.80 : x
  2. Step 2: Convert to fraction form
    2,129.06/3,187.64 = 1,086.80/x
  3. Step 3: Cross multiply
    2,129.06x = 3,187.64 × 1,086.80
  4. Step 4: Simplify right side
    2,129.06x = 3,464,327.15
  5. Step 5: Solve for x
    x = 3,464,327.15/2,129.06
  6. Step 6: Final answer
    x = 1,627.16

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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.