Home / 7,981.50-11,972.41-2,138.06

Finding the Fourth Proportional to 7,981.50, 11,972.41 and 2,138.06

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Solution

The fourth proportional to 7,981.50, 11,972.41 and 2,138.06 is: 3,207.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.50 : 11,972.41 = 2,138.06 : x
  2. Step 2: Convert to fraction form
    7,981.50/11,972.41 = 2,138.06/x
  3. Step 3: Cross multiply
    7,981.50x = 11,972.41 × 2,138.06
  4. Step 4: Simplify right side
    7,981.50x = 25,597,755.51
  5. Step 5: Solve for x
    x = 25,597,755.51/7,981.50
  6. Step 6: Final answer
    x = 3,207.13

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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.