Home / 20,667.18-30,997.86-6,811.50

Finding the Fourth Proportional to 20,667.18, 30,997.86 and 6,811.50

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Solution

The fourth proportional to 20,667.18, 30,997.86 and 6,811.50 is: 10,216.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.18 : 30,997.86 = 6,811.50 : x
  2. Step 2: Convert to fraction form
    20,667.18/30,997.86 = 6,811.50/x
  3. Step 3: Cross multiply
    20,667.18x = 30,997.86 × 6,811.50
  4. Step 4: Simplify right side
    20,667.18x = 211,141,923.39
  5. Step 5: Solve for x
    x = 211,141,923.39/20,667.18
  6. Step 6: Final answer
    x = 10,216.29

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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.