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Finding the Fourth Proportional to 18,713,410.80, 28,015,003.80 and 13,942,251.60

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Solution

The fourth proportional to 18,713,410.80, 28,015,003.80 and 13,942,251.60 is: 20,872,316.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,713,410.80 : 28,015,003.80 = 13,942,251.60 : x
  2. Step 2: Convert to fraction form
    18,713,410.80/28,015,003.80 = 13,942,251.60/x
  3. Step 3: Cross multiply
    18,713,410.80x = 28,015,003.80 × 13,942,251.60
  4. Step 4: Simplify right side
    18,713,410.80x = 390,592,231,554,556.06
  5. Step 5: Solve for x
    x = 390,592,231,554,556.06/18,713,410.80
  6. Step 6: Final answer
    x = 20,872,316.42

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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.