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Finding the Fourth Proportional to 18,987,981.80, 28,482,750.30 and 5,524,809.80

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Solution

The fourth proportional to 18,987,981.80, 28,482,750.30 and 5,524,809.80 is: 8,287,440.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987,981.80 : 28,482,750.30 = 5,524,809.80 : x
  2. Step 2: Convert to fraction form
    18,987,981.80/28,482,750.30 = 5,524,809.80/x
  3. Step 3: Cross multiply
    18,987,981.80x = 28,482,750.30 × 5,524,809.80
  4. Step 4: Simplify right side
    18,987,981.80x = 157,361,777,988,392.94
  5. Step 5: Solve for x
    x = 157,361,777,988,392.94/18,987,981.80
  6. Step 6: Final answer
    x = 8,287,440.95

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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.