Home / 7,872.03-11,815.34-3,979.17

Finding the Fourth Proportional to 7,872.03, 11,815.34 and 3,979.17

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Solution

The fourth proportional to 7,872.03, 11,815.34 and 3,979.17 is: 5,972.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,872.03 : 11,815.34 = 3,979.17 : x
  2. Step 2: Convert to fraction form
    7,872.03/11,815.34 = 3,979.17/x
  3. Step 3: Cross multiply
    7,872.03x = 11,815.34 × 3,979.17
  4. Step 4: Simplify right side
    7,872.03x = 47,015,226.57
  5. Step 5: Solve for x
    x = 47,015,226.57/7,872.03
  6. Step 6: Final answer
    x = 5,972.44

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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.