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Finding the Fourth Proportional to 6,279.84, 8,668.44 and 3,921.12

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Solution

The fourth proportional to 6,279.84, 8,668.44 and 3,921.12 is: 5,412.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,279.84 : 8,668.44 = 3,921.12 : x
  2. Step 2: Convert to fraction form
    6,279.84/8,668.44 = 3,921.12/x
  3. Step 3: Cross multiply
    6,279.84x = 8,668.44 × 3,921.12
  4. Step 4: Simplify right side
    6,279.84x = 33,989,993.45
  5. Step 5: Solve for x
    x = 33,989,993.45/6,279.84
  6. Step 6: Final answer
    x = 5,412.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.