Home / 3,917.12-5,405.70-2,148.86

Finding the Fourth Proportional to 3,917.12, 5,405.70 and 2,148.86

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Solution

The fourth proportional to 3,917.12, 5,405.70 and 2,148.86 is: 2,965.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.12 : 5,405.70 = 2,148.86 : x
  2. Step 2: Convert to fraction form
    3,917.12/5,405.70 = 2,148.86/x
  3. Step 3: Cross multiply
    3,917.12x = 5,405.70 × 2,148.86
  4. Step 4: Simplify right side
    3,917.12x = 11,616,092.50
  5. Step 5: Solve for x
    x = 11,616,092.50/3,917.12
  6. Step 6: Final answer
    x = 2,965.47

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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.