Home / 3,871.24-5,806.38-1,405.96

Finding the Fourth Proportional to 3,871.24, 5,806.38 and 1,405.96

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Solution

The fourth proportional to 3,871.24, 5,806.38 and 1,405.96 is: 2,108.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.24 : 5,806.38 = 1,405.96 : x
  2. Step 2: Convert to fraction form
    3,871.24/5,806.38 = 1,405.96/x
  3. Step 3: Cross multiply
    3,871.24x = 5,806.38 × 1,405.96
  4. Step 4: Simplify right side
    3,871.24x = 8,163,538.02
  5. Step 5: Solve for x
    x = 8,163,538.02/3,871.24
  6. Step 6: Final answer
    x = 2,108.77

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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.