Home / 31,744.86-43,825.23-20,990.22

Finding the Fourth Proportional to 31,744.86, 43,825.23 and 20,990.22

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Solution

The fourth proportional to 31,744.86, 43,825.23 and 20,990.22 is: 28,977.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,744.86 : 43,825.23 = 20,990.22 : x
  2. Step 2: Convert to fraction form
    31,744.86/43,825.23 = 20,990.22/x
  3. Step 3: Cross multiply
    31,744.86x = 43,825.23 × 20,990.22
  4. Step 4: Simplify right side
    31,744.86x = 919,901,219.25
  5. Step 5: Solve for x
    x = 919,901,219.25/31,744.86
  6. Step 6: Final answer
    x = 28,977.96

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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.