Home / 18,720,937.20-28,081,405.80-7,361,756.40

Finding the Fourth Proportional to 18,720,937.20, 28,081,405.80 and 7,361,756.40

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Solution

The fourth proportional to 18,720,937.20, 28,081,405.80 and 7,361,756.40 is: 11,042,634.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720,937.20 : 28,081,405.80 = 7,361,756.40 : x
  2. Step 2: Convert to fraction form
    18,720,937.20/28,081,405.80 = 7,361,756.40/x
  3. Step 3: Cross multiply
    18,720,937.20x = 28,081,405.80 × 7,361,756.40
  4. Step 4: Simplify right side
    18,720,937.20x = 206,728,468,869,147.12
  5. Step 5: Solve for x
    x = 206,728,468,869,147.12/18,720,937.20
  6. Step 6: Final answer
    x = 11,042,634.60

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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.