Home / 4,112.78-6,169.53-1,338.72

Finding the Fourth Proportional to 4,112.78, 6,169.53 and 1,338.72

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Solution

The fourth proportional to 4,112.78, 6,169.53 and 1,338.72 is: 2,008.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,112.78 : 6,169.53 = 1,338.72 : x
  2. Step 2: Convert to fraction form
    4,112.78/6,169.53 = 1,338.72/x
  3. Step 3: Cross multiply
    4,112.78x = 6,169.53 × 1,338.72
  4. Step 4: Simplify right side
    4,112.78x = 8,259,273.20
  5. Step 5: Solve for x
    x = 8,259,273.20/4,112.78
  6. Step 6: Final answer
    x = 2,008.20

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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.