Home / 31,821.97-43,909.44-18,390.63

Finding the Fourth Proportional to 31,821.97, 43,909.44 and 18,390.63

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Solution

The fourth proportional to 31,821.97, 43,909.44 and 18,390.63 is: 25,376.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,821.97 : 43,909.44 = 18,390.63 : x
  2. Step 2: Convert to fraction form
    31,821.97/43,909.44 = 18,390.63/x
  3. Step 3: Cross multiply
    31,821.97x = 43,909.44 × 18,390.63
  4. Step 4: Simplify right side
    31,821.97x = 807,522,513.96
  5. Step 5: Solve for x
    x = 807,522,513.96/31,821.97
  6. Step 6: Final answer
    x = 25,376.25

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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.