Home / 11,979.96-17,989.92-7,392.12

Finding the Fourth Proportional to 11,979.96, 17,989.92 and 7,392.12

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Solution

The fourth proportional to 11,979.96, 17,989.92 and 7,392.12 is: 11,100.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,979.96 : 17,989.92 = 7,392.12 : x
  2. Step 2: Convert to fraction form
    11,979.96/17,989.92 = 7,392.12/x
  3. Step 3: Cross multiply
    11,979.96x = 17,989.92 × 7,392.12
  4. Step 4: Simplify right side
    11,979.96x = 132,983,647.43
  5. Step 5: Solve for x
    x = 132,983,647.43/11,979.96
  6. Step 6: Final answer
    x = 11,100.51

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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.