Home / 30,993.45-42,770.32-18,247.96

Finding the Fourth Proportional to 30,993.45, 42,770.32 and 18,247.96

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Solution

The fourth proportional to 30,993.45, 42,770.32 and 18,247.96 is: 25,181.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,993.45 : 42,770.32 = 18,247.96 : x
  2. Step 2: Convert to fraction form
    30,993.45/42,770.32 = 18,247.96/x
  3. Step 3: Cross multiply
    30,993.45x = 42,770.32 × 18,247.96
  4. Step 4: Simplify right side
    30,993.45x = 780,471,088.55
  5. Step 5: Solve for x
    x = 780,471,088.55/30,993.45
  6. Step 6: Final answer
    x = 25,181.81

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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.