Home / 7,981.32-11,970.90-2,137.98

Finding the Fourth Proportional to 7,981.32, 11,970.90 and 2,137.98

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Solution

The fourth proportional to 7,981.32, 11,970.90 and 2,137.98 is: 3,206.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.32 : 11,970.90 = 2,137.98 : x
  2. Step 2: Convert to fraction form
    7,981.32/11,970.90 = 2,137.98/x
  3. Step 3: Cross multiply
    7,981.32x = 11,970.90 × 2,137.98
  4. Step 4: Simplify right side
    7,981.32x = 25,593,544.78
  5. Step 5: Solve for x
    x = 25,593,544.78/7,981.32
  6. Step 6: Final answer
    x = 3,206.68

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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.