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Finding the Fourth Proportional to 9,179.72, 13,770.42 and 2,939.48

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Solution

The fourth proportional to 9,179.72, 13,770.42 and 2,939.48 is: 4,409.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,179.72 : 13,770.42 = 2,939.48 : x
  2. Step 2: Convert to fraction form
    9,179.72/13,770.42 = 2,939.48/x
  3. Step 3: Cross multiply
    9,179.72x = 13,770.42 × 2,939.48
  4. Step 4: Simplify right side
    9,179.72x = 40,477,874.18
  5. Step 5: Solve for x
    x = 40,477,874.18/9,179.72
  6. Step 6: Final answer
    x = 4,409.49

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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.