Home / 3,171.76-4,376.51-1,991.99

Finding the Fourth Proportional to 3,171.76, 4,376.51 and 1,991.99

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Solution

The fourth proportional to 3,171.76, 4,376.51 and 1,991.99 is: 2,748.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.76 : 4,376.51 = 1,991.99 : x
  2. Step 2: Convert to fraction form
    3,171.76/4,376.51 = 1,991.99/x
  3. Step 3: Cross multiply
    3,171.76x = 4,376.51 × 1,991.99
  4. Step 4: Simplify right side
    3,171.76x = 8,717,964.15
  5. Step 5: Solve for x
    x = 8,717,964.15/3,171.76
  6. Step 6: Final answer
    x = 2,748.62

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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.