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Finding the Fourth Proportional to 19,163.63, 28,745.44 and 5,312.63

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Solution

The fourth proportional to 19,163.63, 28,745.44 and 5,312.63 is: 7,968.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,163.63 : 28,745.44 = 5,312.63 : x
  2. Step 2: Convert to fraction form
    19,163.63/28,745.44 = 5,312.63/x
  3. Step 3: Cross multiply
    19,163.63x = 28,745.44 × 5,312.63
  4. Step 4: Simplify right side
    19,163.63x = 152,713,729.90
  5. Step 5: Solve for x
    x = 152,713,729.90/19,163.63
  6. Step 6: Final answer
    x = 7,968.94

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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.