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Finding the Fourth Proportional to 13,179.68, 18,186.72 and 8,922.08

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Solution

The fourth proportional to 13,179.68, 18,186.72 and 8,922.08 is: 12,311.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.68 : 18,186.72 = 8,922.08 : x
  2. Step 2: Convert to fraction form
    13,179.68/18,186.72 = 8,922.08/x
  3. Step 3: Cross multiply
    13,179.68x = 18,186.72 × 8,922.08
  4. Step 4: Simplify right side
    13,179.68x = 162,263,370.78
  5. Step 5: Solve for x
    x = 162,263,370.78/13,179.68
  6. Step 6: Final answer
    x = 12,311.63

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1.5x scale

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.