Home / 31,218.60-43,052.79-21,161.64

Finding the Fourth Proportional to 31,218.60, 43,052.79 and 21,161.64

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Solution

The fourth proportional to 31,218.60, 43,052.79 and 21,161.64 is: 29,183.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,218.60 : 43,052.79 = 21,161.64 : x
  2. Step 2: Convert to fraction form
    31,218.60/43,052.79 = 21,161.64/x
  3. Step 3: Cross multiply
    31,218.60x = 43,052.79 × 21,161.64
  4. Step 4: Simplify right side
    31,218.60x = 911,067,642.98
  5. Step 5: Solve for x
    x = 911,067,642.98/31,218.60
  6. Step 6: Final answer
    x = 29,183.49

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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.