Home / 13,870.11-20,805.15-3,481.86

Finding the Fourth Proportional to 13,870.11, 20,805.15 and 3,481.86

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Solution

The fourth proportional to 13,870.11, 20,805.15 and 3,481.86 is: 5,222.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.11 : 20,805.15 = 3,481.86 : x
  2. Step 2: Convert to fraction form
    13,870.11/20,805.15 = 3,481.86/x
  3. Step 3: Cross multiply
    13,870.11x = 20,805.15 × 3,481.86
  4. Step 4: Simplify right side
    13,870.11x = 72,440,619.58
  5. Step 5: Solve for x
    x = 72,440,619.58/13,870.11
  6. Step 6: Final answer
    x = 5,222.79

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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.