Home / 5,245.87-7,871.54-2,128.18

Finding the Fourth Proportional to 5,245.87, 7,871.54 and 2,128.18

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Solution

The fourth proportional to 5,245.87, 7,871.54 and 2,128.18 is: 3,193.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,245.87 : 7,871.54 = 2,128.18 : x
  2. Step 2: Convert to fraction form
    5,245.87/7,871.54 = 2,128.18/x
  3. Step 3: Cross multiply
    5,245.87x = 7,871.54 × 2,128.18
  4. Step 4: Simplify right side
    5,245.87x = 16,752,004.00
  5. Step 5: Solve for x
    x = 16,752,004.00/5,245.87
  6. Step 6: Final answer
    x = 3,193.37

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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.