Home / 7,989.72-11,979.38-3,308.46

Finding the Fourth Proportional to 7,989.72, 11,979.38 and 3,308.46

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Solution

The fourth proportional to 7,989.72, 11,979.38 and 3,308.46 is: 4,960.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,989.72 : 11,979.38 = 3,308.46 : x
  2. Step 2: Convert to fraction form
    7,989.72/11,979.38 = 3,308.46/x
  3. Step 3: Cross multiply
    7,989.72x = 11,979.38 × 3,308.46
  4. Step 4: Simplify right side
    7,989.72x = 39,633,247.93
  5. Step 5: Solve for x
    x = 39,633,247.93/7,989.72
  6. Step 6: Final answer
    x = 4,960.53

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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.