Home / 7,981.88-11,971.46-2,137.13

Finding the Fourth Proportional to 7,981.88, 11,971.46 and 2,137.13

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Solution

The fourth proportional to 7,981.88, 11,971.46 and 2,137.13 is: 3,205.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.88 : 11,971.46 = 2,137.13 : x
  2. Step 2: Convert to fraction form
    7,981.88/11,971.46 = 2,137.13/x
  3. Step 3: Cross multiply
    7,981.88x = 11,971.46 × 2,137.13
  4. Step 4: Simplify right side
    7,981.88x = 25,584,495.77
  5. Step 5: Solve for x
    x = 25,584,495.77/7,981.88
  6. Step 6: Final answer
    x = 3,205.32

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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.