Home / 31,739.72-43,770.60-18,990.86

Finding the Fourth Proportional to 31,739.72, 43,770.60 and 18,990.86

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Solution

The fourth proportional to 31,739.72, 43,770.60 and 18,990.86 is: 26,189.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,739.72 : 43,770.60 = 18,990.86 : x
  2. Step 2: Convert to fraction form
    31,739.72/43,770.60 = 18,990.86/x
  3. Step 3: Cross multiply
    31,739.72x = 43,770.60 × 18,990.86
  4. Step 4: Simplify right side
    31,739.72x = 831,241,336.72
  5. Step 5: Solve for x
    x = 831,241,336.72/31,739.72
  6. Step 6: Final answer
    x = 26,189.31

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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.