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Finding the Fourth Proportional to 18,425,978.76, 25,436,003.96 and 11,902,788.32

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Solution

The fourth proportional to 18,425,978.76, 25,436,003.96 and 11,902,788.32 is: 16,431,114.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,425,978.76 : 25,436,003.96 = 11,902,788.32 : x
  2. Step 2: Convert to fraction form
    18,425,978.76/25,436,003.96 = 11,902,788.32/x
  3. Step 3: Cross multiply
    18,425,978.76x = 25,436,003.96 × 11,902,788.32
  4. Step 4: Simplify right side
    18,425,978.76x = 302,759,370,842,561.75
  5. Step 5: Solve for x
    x = 302,759,370,842,561.75/18,425,978.76
  6. Step 6: Final answer
    x = 16,431,114.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.