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Finding the Fourth Proportional to 28,978,680.80, 43,468,021.20 and 18,900,984.80

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Solution

The fourth proportional to 28,978,680.80, 43,468,021.20 and 18,900,984.80 is: 28,351,477.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978,680.80 : 43,468,021.20 = 18,900,984.80 : x
  2. Step 2: Convert to fraction form
    28,978,680.80/43,468,021.20 = 18,900,984.80/x
  3. Step 3: Cross multiply
    28,978,680.80x = 43,468,021.20 × 18,900,984.80
  4. Step 4: Simplify right side
    28,978,680.80x = 821,588,407,987,277.88
  5. Step 5: Solve for x
    x = 821,588,407,987,277.88/28,978,680.80
  6. Step 6: Final answer
    x = 28,351,477.20

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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.