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Finding the Fourth Proportional to 18,515.14, 27,772.58 and 7,421.67

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Solution

The fourth proportional to 18,515.14, 27,772.58 and 7,421.67 is: 11,132.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.14 : 27,772.58 = 7,421.67 : x
  2. Step 2: Convert to fraction form
    18,515.14/27,772.58 = 7,421.67/x
  3. Step 3: Cross multiply
    18,515.14x = 27,772.58 × 7,421.67
  4. Step 4: Simplify right side
    18,515.14x = 206,118,942.36
  5. Step 5: Solve for x
    x = 206,118,942.36/18,515.14
  6. Step 6: Final answer
    x = 11,132.45

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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.