Home / 2,129.05-3,187.65-1,086.80

Finding the Fourth Proportional to 2,129.05, 3,187.65 and 1,086.80

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Solution

The fourth proportional to 2,129.05, 3,187.65 and 1,086.80 is: 1,627.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.05 : 3,187.65 = 1,086.80 : x
  2. Step 2: Convert to fraction form
    2,129.05/3,187.65 = 1,086.80/x
  3. Step 3: Cross multiply
    2,129.05x = 3,187.65 × 1,086.80
  4. Step 4: Simplify right side
    2,129.05x = 3,464,338.02
  5. Step 5: Solve for x
    x = 3,464,338.02/2,129.05
  6. Step 6: Final answer
    x = 1,627.18

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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.