Home / 5,405.72-8,100.48-4,171.28

Finding the Fourth Proportional to 5,405.72, 8,100.48 and 4,171.28

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Solution

The fourth proportional to 5,405.72, 8,100.48 and 4,171.28 is: 6,250.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,405.72 : 8,100.48 = 4,171.28 : x
  2. Step 2: Convert to fraction form
    5,405.72/8,100.48 = 4,171.28/x
  3. Step 3: Cross multiply
    5,405.72x = 8,100.48 × 4,171.28
  4. Step 4: Simplify right side
    5,405.72x = 33,789,370.21
  5. Step 5: Solve for x
    x = 33,789,370.21/5,405.72
  6. Step 6: Final answer
    x = 6,250.67

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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.