Home / 31,704.80-43,781.72-20,400.75

Finding the Fourth Proportional to 31,704.80, 43,781.72 and 20,400.75

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Solution

The fourth proportional to 31,704.80, 43,781.72 and 20,400.75 is: 28,171.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,704.80 : 43,781.72 = 20,400.75 : x
  2. Step 2: Convert to fraction form
    31,704.80/43,781.72 = 20,400.75/x
  3. Step 3: Cross multiply
    31,704.80x = 43,781.72 × 20,400.75
  4. Step 4: Simplify right side
    31,704.80x = 893,179,822.29
  5. Step 5: Solve for x
    x = 893,179,822.29/31,704.80
  6. Step 6: Final answer
    x = 28,171.76

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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.