Home / 20,511,979.23-30,768,020.99-8,381,442.72

Finding the Fourth Proportional to 20,511,979.23, 30,768,020.99 and 8,381,442.72

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Solution

The fourth proportional to 20,511,979.23, 30,768,020.99 and 8,381,442.72 is: 12,572,185.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511,979.23 : 30,768,020.99 = 8,381,442.72 : x
  2. Step 2: Convert to fraction form
    20,511,979.23/30,768,020.99 = 8,381,442.72/x
  3. Step 3: Cross multiply
    20,511,979.23x = 30,768,020.99 × 8,381,442.72
  4. Step 4: Simplify right side
    20,511,979.23x = 257,880,405,493,535.47
  5. Step 5: Solve for x
    x = 257,880,405,493,535.47/20,511,979.23
  6. Step 6: Final answer
    x = 12,572,185.39

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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.