Home / 6,979.96-9,629.06-4,147.42

Finding the Fourth Proportional to 6,979.96, 9,629.06 and 4,147.42

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Solution

The fourth proportional to 6,979.96, 9,629.06 and 4,147.42 is: 5,721.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,979.96 : 9,629.06 = 4,147.42 : x
  2. Step 2: Convert to fraction form
    6,979.96/9,629.06 = 4,147.42/x
  3. Step 3: Cross multiply
    6,979.96x = 9,629.06 × 4,147.42
  4. Step 4: Simplify right side
    6,979.96x = 39,935,742.32
  5. Step 5: Solve for x
    x = 39,935,742.32/6,979.96
  6. Step 6: Final answer
    x = 5,721.49

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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.