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Finding the Fourth Proportional to 16,978,660.40, 25,412,003.40 and 11,939,812.40

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Solution

The fourth proportional to 16,978,660.40, 25,412,003.40 and 11,939,812.40 is: 17,870,347.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,978,660.40 : 25,412,003.40 = 11,939,812.40 : x
  2. Step 2: Convert to fraction form
    16,978,660.40/25,412,003.40 = 11,939,812.40/x
  3. Step 3: Cross multiply
    16,978,660.40x = 25,412,003.40 × 11,939,812.40
  4. Step 4: Simplify right side
    16,978,660.40x = 303,414,553,304,162.12
  5. Step 5: Solve for x
    x = 303,414,553,304,162.12/16,978,660.40
  6. Step 6: Final answer
    x = 17,870,347.02

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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.