Home / 18,990,012.57-28,450,770.40-11,690,768.85

Finding the Fourth Proportional to 18,990,012.57, 28,450,770.40 and 11,690,768.85

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Solution

The fourth proportional to 18,990,012.57, 28,450,770.40 and 11,690,768.85 is: 17,515,068.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990,012.57 : 28,450,770.40 = 11,690,768.85 : x
  2. Step 2: Convert to fraction form
    18,990,012.57/28,450,770.40 = 11,690,768.85/x
  3. Step 3: Cross multiply
    18,990,012.57x = 28,450,770.40 × 11,690,768.85
  4. Step 4: Simplify right side
    18,990,012.57x = 332,611,380,350,822
  5. Step 5: Solve for x
    x = 332,611,380,350,822/18,990,012.57
  6. Step 6: Final answer
    x = 17,515,068.99

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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.