Home / 7,972.16-11,958.24-2,128.79

Finding the Fourth Proportional to 7,972.16, 11,958.24 and 2,128.79

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Solution

The fourth proportional to 7,972.16, 11,958.24 and 2,128.79 is: 3,193.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,972.16 : 11,958.24 = 2,128.79 : x
  2. Step 2: Convert to fraction form
    7,972.16/11,958.24 = 2,128.79/x
  3. Step 3: Cross multiply
    7,972.16x = 11,958.24 × 2,128.79
  4. Step 4: Simplify right side
    7,972.16x = 25,456,581.73
  5. Step 5: Solve for x
    x = 25,456,581.73/7,972.16
  6. Step 6: Final answer
    x = 3,193.19

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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.