Home / 3,917.09-5,405.72-2,148.70

Finding the Fourth Proportional to 3,917.09, 5,405.72 and 2,148.70

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Solution

The fourth proportional to 3,917.09, 5,405.72 and 2,148.70 is: 2,965.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.09 : 5,405.72 = 2,148.70 : x
  2. Step 2: Convert to fraction form
    3,917.09/5,405.72 = 2,148.70/x
  3. Step 3: Cross multiply
    3,917.09x = 5,405.72 × 2,148.70
  4. Step 4: Simplify right side
    3,917.09x = 11,615,246.31
  5. Step 5: Solve for x
    x = 11,615,246.31/3,917.09
  6. Step 6: Final answer
    x = 2,965.28

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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.