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Finding the Fourth Proportional to 6,660.36, 9,978.39 and 4,471.20

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Solution

The fourth proportional to 6,660.36, 9,978.39 and 4,471.20 is: 6,698.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,660.36 : 9,978.39 = 4,471.20 : x
  2. Step 2: Convert to fraction form
    6,660.36/9,978.39 = 4,471.20/x
  3. Step 3: Cross multiply
    6,660.36x = 9,978.39 × 4,471.20
  4. Step 4: Simplify right side
    6,660.36x = 44,615,377.37
  5. Step 5: Solve for x
    x = 44,615,377.37/6,660.36
  6. Step 6: Final answer
    x = 6,698.64

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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.