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Finding the Fourth Proportional to 6,900, 10,350.21 and 2,220.48

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Solution

The fourth proportional to 6,900, 10,350.21 and 2,220.48 is: 3,330.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,900 : 10,350.21 = 2,220.48 : x
  2. Step 2: Convert to fraction form
    6,900/10,350.21 = 2,220.48/x
  3. Step 3: Cross multiply
    6,900x = 10,350.21 × 2,220.48
  4. Step 4: Simplify right side
    6,900x = 22,982,434.30
  5. Step 5: Solve for x
    x = 22,982,434.30/6,900
  6. Step 6: Final answer
    x = 3,330.79

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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.