Home / 3,128.20-4,318.32-1,994.36

Finding the Fourth Proportional to 3,128.20, 4,318.32 and 1,994.36

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Solution

The fourth proportional to 3,128.20, 4,318.32 and 1,994.36 is: 2,753.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.20 : 4,318.32 = 1,994.36 : x
  2. Step 2: Convert to fraction form
    3,128.20/4,318.32 = 1,994.36/x
  3. Step 3: Cross multiply
    3,128.20x = 4,318.32 × 1,994.36
  4. Step 4: Simplify right side
    3,128.20x = 8,612,284.68
  5. Step 5: Solve for x
    x = 8,612,284.68/3,128.20
  6. Step 6: Final answer
    x = 2,753.11

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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.