Home / 5,121.42-7,679.56-2,487.28

Finding the Fourth Proportional to 5,121.42, 7,679.56 and 2,487.28

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Solution

The fourth proportional to 5,121.42, 7,679.56 and 2,487.28 is: 3,729.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.42 : 7,679.56 = 2,487.28 : x
  2. Step 2: Convert to fraction form
    5,121.42/7,679.56 = 2,487.28/x
  3. Step 3: Cross multiply
    5,121.42x = 7,679.56 × 2,487.28
  4. Step 4: Simplify right side
    5,121.42x = 19,101,216.00
  5. Step 5: Solve for x
    x = 19,101,216.00/5,121.42
  6. Step 6: Final answer
    x = 3,729.67

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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.