Home / 13,471,321.20-20,206,981.80-7,788,620.40

Finding the Fourth Proportional to 13,471,321.20, 20,206,981.80 and 7,788,620.40

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Solution

The fourth proportional to 13,471,321.20, 20,206,981.80 and 7,788,620.40 is: 11,682,930.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,471,321.20 : 20,206,981.80 = 7,788,620.40 : x
  2. Step 2: Convert to fraction form
    13,471,321.20/20,206,981.80 = 7,788,620.40/x
  3. Step 3: Cross multiply
    13,471,321.20x = 20,206,981.80 × 7,788,620.40
  4. Step 4: Simplify right side
    13,471,321.20x = 157,384,510,669,908.72
  5. Step 5: Solve for x
    x = 157,384,510,669,908.72/13,471,321.20
  6. Step 6: Final answer
    x = 11,682,930.60

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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.