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Finding the Fourth Proportional to 21,978,087.88, 32,970,163.42 and 12,760,401.42

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Solution

The fourth proportional to 21,978,087.88, 32,970,163.42 and 12,760,401.42 is: 19,142,362.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,978,087.88 : 32,970,163.42 = 12,760,401.42 : x
  2. Step 2: Convert to fraction form
    21,978,087.88/32,970,163.42 = 12,760,401.42/x
  3. Step 3: Cross multiply
    21,978,087.88x = 32,970,163.42 × 12,760,401.42
  4. Step 4: Simplify right side
    21,978,087.88x = 420,712,520,122,200.06
  5. Step 5: Solve for x
    x = 420,712,520,122,200.06/21,978,087.88
  6. Step 6: Final answer
    x = 19,142,362.27

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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.