Home / 3,171.51-4,376.17-1,991.75

Finding the Fourth Proportional to 3,171.51, 4,376.17 and 1,991.75

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Solution

The fourth proportional to 3,171.51, 4,376.17 and 1,991.75 is: 2,748.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.51 : 4,376.17 = 1,991.75 : x
  2. Step 2: Convert to fraction form
    3,171.51/4,376.17 = 1,991.75/x
  3. Step 3: Cross multiply
    3,171.51x = 4,376.17 × 1,991.75
  4. Step 4: Simplify right side
    3,171.51x = 8,716,204.76
  5. Step 5: Solve for x
    x = 8,716,204.76/3,171.51
  6. Step 6: Final answer
    x = 2,748.28

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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.