Home / 3,128.82-4,318.35-2,009.58

Finding the Fourth Proportional to 3,128.82, 4,318.35 and 2,009.58

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Solution

The fourth proportional to 3,128.82, 4,318.35 and 2,009.58 is: 2,773.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.82 : 4,318.35 = 2,009.58 : x
  2. Step 2: Convert to fraction form
    3,128.82/4,318.35 = 2,009.58/x
  3. Step 3: Cross multiply
    3,128.82x = 4,318.35 × 2,009.58
  4. Step 4: Simplify right side
    3,128.82x = 8,678,069.79
  5. Step 5: Solve for x
    x = 8,678,069.79/3,128.82
  6. Step 6: Final answer
    x = 2,773.59

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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.