Home / 31,780.97-43,853.15-20,465.81

Finding the Fourth Proportional to 31,780.97, 43,853.15 and 20,465.81

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Solution

The fourth proportional to 31,780.97, 43,853.15 and 20,465.81 is: 28,239.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,780.97 : 43,853.15 = 20,465.81 : x
  2. Step 2: Convert to fraction form
    31,780.97/43,853.15 = 20,465.81/x
  3. Step 3: Cross multiply
    31,780.97x = 43,853.15 × 20,465.81
  4. Step 4: Simplify right side
    31,780.97x = 897,489,914.21
  5. Step 5: Solve for x
    x = 897,489,914.21/31,780.97
  6. Step 6: Final answer
    x = 28,239.86

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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.