Home / 3,900.63-5,382.88-2,408.21

Finding the Fourth Proportional to 3,900.63, 5,382.88 and 2,408.21

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Solution

The fourth proportional to 3,900.63, 5,382.88 and 2,408.21 is: 3,323.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.63 : 5,382.88 = 2,408.21 : x
  2. Step 2: Convert to fraction form
    3,900.63/5,382.88 = 2,408.21/x
  3. Step 3: Cross multiply
    3,900.63x = 5,382.88 × 2,408.21
  4. Step 4: Simplify right side
    3,900.63x = 12,963,072.51
  5. Step 5: Solve for x
    x = 12,963,072.51/3,900.63
  6. Step 6: Final answer
    x = 3,323.33

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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.