Home / 3,619.79-4,996.30-2,128.20

Finding the Fourth Proportional to 3,619.79, 4,996.30 and 2,128.20

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Solution

The fourth proportional to 3,619.79, 4,996.30 and 2,128.20 is: 2,937.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.79 : 4,996.30 = 2,128.20 : x
  2. Step 2: Convert to fraction form
    3,619.79/4,996.30 = 2,128.20/x
  3. Step 3: Cross multiply
    3,619.79x = 4,996.30 × 2,128.20
  4. Step 4: Simplify right side
    3,619.79x = 10,633,100.68
  5. Step 5: Solve for x
    x = 10,633,100.68/3,619.79
  6. Step 6: Final answer
    x = 2,937.49

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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.