Home / 20,771.66-31,157.57-5,189.30

Finding the Fourth Proportional to 20,771.66, 31,157.57 and 5,189.30

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Solution

The fourth proportional to 20,771.66, 31,157.57 and 5,189.30 is: 7,783.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.66 : 31,157.57 = 5,189.30 : x
  2. Step 2: Convert to fraction form
    20,771.66/31,157.57 = 5,189.30/x
  3. Step 3: Cross multiply
    20,771.66x = 31,157.57 × 5,189.30
  4. Step 4: Simplify right side
    20,771.66x = 161,685,978.00
  5. Step 5: Solve for x
    x = 161,685,978.00/20,771.66
  6. Step 6: Final answer
    x = 7,783.97

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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.