Home / 6,480.20-9,720.30-2,100.72

Finding the Fourth Proportional to 6,480.20, 9,720.30 and 2,100.72

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Solution

The fourth proportional to 6,480.20, 9,720.30 and 2,100.72 is: 3,151.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,480.20 : 9,720.30 = 2,100.72 : x
  2. Step 2: Convert to fraction form
    6,480.20/9,720.30 = 2,100.72/x
  3. Step 3: Cross multiply
    6,480.20x = 9,720.30 × 2,100.72
  4. Step 4: Simplify right side
    6,480.20x = 20,419,628.62
  5. Step 5: Solve for x
    x = 20,419,628.62/6,480.20
  6. Step 6: Final answer
    x = 3,151.08

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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.