Home / 3,917.76-5,406.63-2,149.36

Finding the Fourth Proportional to 3,917.76, 5,406.63 and 2,149.36

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Solution

The fourth proportional to 3,917.76, 5,406.63 and 2,149.36 is: 2,966.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.76 : 5,406.63 = 2,149.36 : x
  2. Step 2: Convert to fraction form
    3,917.76/5,406.63 = 2,149.36/x
  3. Step 3: Cross multiply
    3,917.76x = 5,406.63 × 2,149.36
  4. Step 4: Simplify right side
    3,917.76x = 11,620,780.74
  5. Step 5: Solve for x
    x = 11,620,780.74/3,917.76
  6. Step 6: Final answer
    x = 2,966.18

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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.