Home / 13,806.86-20,695.40-6,778.70

Finding the Fourth Proportional to 13,806.86, 20,695.40 and 6,778.70

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Solution

The fourth proportional to 13,806.86, 20,695.40 and 6,778.70 is: 10,160.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,806.86 : 20,695.40 = 6,778.70 : x
  2. Step 2: Convert to fraction form
    13,806.86/20,695.40 = 6,778.70/x
  3. Step 3: Cross multiply
    13,806.86x = 20,695.40 × 6,778.70
  4. Step 4: Simplify right side
    13,806.86x = 140,287,874.09
  5. Step 5: Solve for x
    x = 140,287,874.09/13,806.86
  6. Step 6: Final answer
    x = 10,160.74

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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.