Home / 5,481.20-8,221.80-3,140.30

Finding the Fourth Proportional to 5,481.20, 8,221.80 and 3,140.30

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Solution

The fourth proportional to 5,481.20, 8,221.80 and 3,140.30 is: 4,710.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,481.20 : 8,221.80 = 3,140.30 : x
  2. Step 2: Convert to fraction form
    5,481.20/8,221.80 = 3,140.30/x
  3. Step 3: Cross multiply
    5,481.20x = 8,221.80 × 3,140.30
  4. Step 4: Simplify right side
    5,481.20x = 25,818,918.54
  5. Step 5: Solve for x
    x = 25,818,918.54/5,481.20
  6. Step 6: Final answer
    x = 4,710.45

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1.5x scale

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.