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Finding the Fourth Proportional to 18,343,863.80, 27,515,795.70 and 14,105,425.40

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Solution

The fourth proportional to 18,343,863.80, 27,515,795.70 and 14,105,425.40 is: 21,158,138.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,343,863.80 : 27,515,795.70 = 14,105,425.40 : x
  2. Step 2: Convert to fraction form
    18,343,863.80/27,515,795.70 = 14,105,425.40/x
  3. Step 3: Cross multiply
    18,343,863.80x = 27,515,795.70 × 14,105,425.40
  4. Step 4: Simplify right side
    18,343,863.80x = 388,122,003,567,990.75
  5. Step 5: Solve for x
    x = 388,122,003,567,990.75/18,343,863.80
  6. Step 6: Final answer
    x = 21,158,138.10

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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.