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Finding the Fourth Proportional to 28,576.67, 39,435.79 and 15,830.67

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Solution

The fourth proportional to 28,576.67, 39,435.79 and 15,830.67 is: 21,846.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,576.67 : 39,435.79 = 15,830.67 : x
  2. Step 2: Convert to fraction form
    28,576.67/39,435.79 = 15,830.67/x
  3. Step 3: Cross multiply
    28,576.67x = 39,435.79 × 15,830.67
  4. Step 4: Simplify right side
    28,576.67x = 624,295,071.41
  5. Step 5: Solve for x
    x = 624,295,071.41/28,576.67
  6. Step 6: Final answer
    x = 21,846.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.