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Finding the Fourth Proportional to 30,976.59, 42,751.34 and 18,401.34

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Solution

The fourth proportional to 30,976.59, 42,751.34 and 18,401.34 is: 25,396.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,976.59 : 42,751.34 = 18,401.34 : x
  2. Step 2: Convert to fraction form
    30,976.59/42,751.34 = 18,401.34/x
  3. Step 3: Cross multiply
    30,976.59x = 42,751.34 × 18,401.34
  4. Step 4: Simplify right side
    30,976.59x = 786,682,183.62
  5. Step 5: Solve for x
    x = 786,682,183.62/30,976.59
  6. Step 6: Final answer
    x = 25,396.02

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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.