Home / 7,972.29-11,958.48-2,778.21

Finding the Fourth Proportional to 7,972.29, 11,958.48 and 2,778.21

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Solution

The fourth proportional to 7,972.29, 11,958.48 and 2,778.21 is: 4,167.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,972.29 : 11,958.48 = 2,778.21 : x
  2. Step 2: Convert to fraction form
    7,972.29/11,958.48 = 2,778.21/x
  3. Step 3: Cross multiply
    7,972.29x = 11,958.48 × 2,778.21
  4. Step 4: Simplify right side
    7,972.29x = 33,223,168.72
  5. Step 5: Solve for x
    x = 33,223,168.72/7,972.29
  6. Step 6: Final answer
    x = 4,167.33

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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.