Home / 7,921.70-11,882.56-2,078.42

Finding the Fourth Proportional to 7,921.70, 11,882.56 and 2,078.42

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Solution

The fourth proportional to 7,921.70, 11,882.56 and 2,078.42 is: 3,117.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.70 : 11,882.56 = 2,078.42 : x
  2. Step 2: Convert to fraction form
    7,921.70/11,882.56 = 2,078.42/x
  3. Step 3: Cross multiply
    7,921.70x = 11,882.56 × 2,078.42
  4. Step 4: Simplify right side
    7,921.70x = 24,696,950.36
  5. Step 5: Solve for x
    x = 24,696,950.36/7,921.70
  6. Step 6: Final answer
    x = 3,117.63

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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.