Home / 31,619.89-43,639.82-18,190.90

Finding the Fourth Proportional to 31,619.89, 43,639.82 and 18,190.90

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Solution

The fourth proportional to 31,619.89, 43,639.82 and 18,190.90 is: 25,105.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,619.89 : 43,639.82 = 18,190.90 : x
  2. Step 2: Convert to fraction form
    31,619.89/43,639.82 = 18,190.90/x
  3. Step 3: Cross multiply
    31,619.89x = 43,639.82 × 18,190.90
  4. Step 4: Simplify right side
    31,619.89x = 793,847,601.64
  5. Step 5: Solve for x
    x = 793,847,601.64/31,619.89
  6. Step 6: Final answer
    x = 25,105.96

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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.