Home / 5,427.30-8,128.80-4,190.70

Finding the Fourth Proportional to 5,427.30, 8,128.80 and 4,190.70

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Solution

The fourth proportional to 5,427.30, 8,128.80 and 4,190.70 is: 6,276.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,427.30 : 8,128.80 = 4,190.70 : x
  2. Step 2: Convert to fraction form
    5,427.30/8,128.80 = 4,190.70/x
  3. Step 3: Cross multiply
    5,427.30x = 8,128.80 × 4,190.70
  4. Step 4: Simplify right side
    5,427.30x = 34,065,362.16
  5. Step 5: Solve for x
    x = 34,065,362.16/5,427.30
  6. Step 6: Final answer
    x = 6,276.67

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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.