Home / 3,387.99-4,673.79-2,128.41

Finding the Fourth Proportional to 3,387.99, 4,673.79 and 2,128.41

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Solution

The fourth proportional to 3,387.99, 4,673.79 and 2,128.41 is: 2,936.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.99 : 4,673.79 = 2,128.41 : x
  2. Step 2: Convert to fraction form
    3,387.99/4,673.79 = 2,128.41/x
  3. Step 3: Cross multiply
    3,387.99x = 4,673.79 × 2,128.41
  4. Step 4: Simplify right side
    3,387.99x = 9,947,741.37
  5. Step 5: Solve for x
    x = 9,947,741.37/3,387.99
  6. Step 6: Final answer
    x = 2,936.18

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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.