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Finding the Fourth Proportional to 12,163.21, 18,250.28 and 6,316.63

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Solution

The fourth proportional to 12,163.21, 18,250.28 and 6,316.63 is: 9,477.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,163.21 : 18,250.28 = 6,316.63 : x
  2. Step 2: Convert to fraction form
    12,163.21/18,250.28 = 6,316.63/x
  3. Step 3: Cross multiply
    12,163.21x = 18,250.28 × 6,316.63
  4. Step 4: Simplify right side
    12,163.21x = 115,280,281.95
  5. Step 5: Solve for x
    x = 115,280,281.95/12,163.21
  6. Step 6: Final answer
    x = 9,477.78

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1.5x scale

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.