Home / 3,917.80-5,871.36-1,971.34

Finding the Fourth Proportional to 3,917.80, 5,871.36 and 1,971.34

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Solution

The fourth proportional to 3,917.80, 5,871.36 and 1,971.34 is: 2,954.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.80 : 5,871.36 = 1,971.34 : x
  2. Step 2: Convert to fraction form
    3,917.80/5,871.36 = 1,971.34/x
  3. Step 3: Cross multiply
    3,917.80x = 5,871.36 × 1,971.34
  4. Step 4: Simplify right side
    3,917.80x = 11,574,446.82
  5. Step 5: Solve for x
    x = 11,574,446.82/3,917.80
  6. Step 6: Final answer
    x = 2,954.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.