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Finding the Fourth Proportional to 12,311,992.80, 18,467,989.20 and 12,144,031.20

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Solution

The fourth proportional to 12,311,992.80, 18,467,989.20 and 12,144,031.20 is: 18,216,046.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,311,992.80 : 18,467,989.20 = 12,144,031.20 : x
  2. Step 2: Convert to fraction form
    12,311,992.80/18,467,989.20 = 12,144,031.20/x
  3. Step 3: Cross multiply
    12,311,992.80x = 18,467,989.20 × 12,144,031.20
  4. Step 4: Simplify right side
    12,311,992.80x = 224,275,837,046,063.03
  5. Step 5: Solve for x
    x = 224,275,837,046,063.03/12,311,992.80
  6. Step 6: Final answer
    x = 18,216,046.80

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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.