Home / 7,981.02-11,972.34-2,138.22

Finding the Fourth Proportional to 7,981.02, 11,972.34 and 2,138.22

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Solution

The fourth proportional to 7,981.02, 11,972.34 and 2,138.22 is: 3,207.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.02 : 11,972.34 = 2,138.22 : x
  2. Step 2: Convert to fraction form
    7,981.02/11,972.34 = 2,138.22/x
  3. Step 3: Cross multiply
    7,981.02x = 11,972.34 × 2,138.22
  4. Step 4: Simplify right side
    7,981.02x = 25,599,496.83
  5. Step 5: Solve for x
    x = 25,599,496.83/7,981.02
  6. Step 6: Final answer
    x = 3,207.55

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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.