Home / 13,871.31-20,806.35-3,876.12

Finding the Fourth Proportional to 13,871.31, 20,806.35 and 3,876.12

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Solution

The fourth proportional to 13,871.31, 20,806.35 and 3,876.12 is: 5,814.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,871.31 : 20,806.35 = 3,876.12 : x
  2. Step 2: Convert to fraction form
    13,871.31/20,806.35 = 3,876.12/x
  3. Step 3: Cross multiply
    13,871.31x = 20,806.35 × 3,876.12
  4. Step 4: Simplify right side
    13,871.31x = 80,647,909.36
  5. Step 5: Solve for x
    x = 80,647,909.36/13,871.31
  6. Step 6: Final answer
    x = 5,814.01

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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.