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Finding the Fourth Proportional to 18,343,631.20, 27,515,446.80 and 10,381,007.20

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Solution

The fourth proportional to 18,343,631.20, 27,515,446.80 and 10,381,007.20 is: 15,571,510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,343,631.20 : 27,515,446.80 = 10,381,007.20 : x
  2. Step 2: Convert to fraction form
    18,343,631.20/27,515,446.80 = 10,381,007.20/x
  3. Step 3: Cross multiply
    18,343,631.20x = 27,515,446.80 × 10,381,007.20
  4. Step 4: Simplify right side
    18,343,631.20x = 285,638,051,342,016.94
  5. Step 5: Solve for x
    x = 285,638,051,342,016.94/18,343,631.20
  6. Step 6: Final answer
    x = 15,571,510.80

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.