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Finding the Fourth Proportional to 6,976.78, 9,629.61 and 3,994.34

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Solution

The fourth proportional to 6,976.78, 9,629.61 and 3,994.34 is: 5,513.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,976.78 : 9,629.61 = 3,994.34 : x
  2. Step 2: Convert to fraction form
    6,976.78/9,629.61 = 3,994.34/x
  3. Step 3: Cross multiply
    6,976.78x = 9,629.61 × 3,994.34
  4. Step 4: Simplify right side
    6,976.78x = 38,463,888.26
  5. Step 5: Solve for x
    x = 38,463,888.26/6,976.78
  6. Step 6: Final answer
    x = 5,513.13

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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.