Home / 20,780.37-31,163.58-6,736.68

Finding the Fourth Proportional to 20,780.37, 31,163.58 and 6,736.68

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Solution

The fourth proportional to 20,780.37, 31,163.58 and 6,736.68 is: 10,102.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.37 : 31,163.58 = 6,736.68 : x
  2. Step 2: Convert to fraction form
    20,780.37/31,163.58 = 6,736.68/x
  3. Step 3: Cross multiply
    20,780.37x = 31,163.58 × 6,736.68
  4. Step 4: Simplify right side
    20,780.37x = 209,939,066.11
  5. Step 5: Solve for x
    x = 209,939,066.11/20,780.37
  6. Step 6: Final answer
    x = 10,102.76

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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.