Home / 3,621.78-4,999.24-2,129.62

Finding the Fourth Proportional to 3,621.78, 4,999.24 and 2,129.62

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Solution

The fourth proportional to 3,621.78, 4,999.24 and 2,129.62 is: 2,939.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,621.78 : 4,999.24 = 2,129.62 : x
  2. Step 2: Convert to fraction form
    3,621.78/4,999.24 = 2,129.62/x
  3. Step 3: Cross multiply
    3,621.78x = 4,999.24 × 2,129.62
  4. Step 4: Simplify right side
    3,621.78x = 10,646,481.49
  5. Step 5: Solve for x
    x = 10,646,481.49/3,621.78
  6. Step 6: Final answer
    x = 2,939.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.