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Finding the Fourth Proportional to 19,163.35, 28,745.03 and 8,621.06

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Solution

The fourth proportional to 19,163.35, 28,745.03 and 8,621.06 is: 12,931.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,163.35 : 28,745.03 = 8,621.06 : x
  2. Step 2: Convert to fraction form
    19,163.35/28,745.03 = 8,621.06/x
  3. Step 3: Cross multiply
    19,163.35x = 28,745.03 × 8,621.06
  4. Step 4: Simplify right side
    19,163.35x = 247,812,457.67
  5. Step 5: Solve for x
    x = 247,812,457.67/19,163.35
  6. Step 6: Final answer
    x = 12,931.59

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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.