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Finding the Fourth Proportional to 6,628.80, 9,928.80 and 4,036.80

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Solution

The fourth proportional to 6,628.80, 9,928.80 and 4,036.80 is: 6,046.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,628.80 : 9,928.80 = 4,036.80 : x
  2. Step 2: Convert to fraction form
    6,628.80/9,928.80 = 4,036.80/x
  3. Step 3: Cross multiply
    6,628.80x = 9,928.80 × 4,036.80
  4. Step 4: Simplify right side
    6,628.80x = 40,080,579.84
  5. Step 5: Solve for x
    x = 40,080,579.84/6,628.80
  6. Step 6: Final answer
    x = 6,046.43

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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.