Home / 31,390.26-43,320.60-21,961.86

Finding the Fourth Proportional to 31,390.26, 43,320.60 and 21,961.86

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Solution

The fourth proportional to 31,390.26, 43,320.60 and 21,961.86 is: 30,308.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,390.26 : 43,320.60 = 21,961.86 : x
  2. Step 2: Convert to fraction form
    31,390.26/43,320.60 = 21,961.86/x
  3. Step 3: Cross multiply
    31,390.26x = 43,320.60 × 21,961.86
  4. Step 4: Simplify right side
    31,390.26x = 951,400,952.32
  5. Step 5: Solve for x
    x = 951,400,952.32/31,390.26
  6. Step 6: Final answer
    x = 30,308.79

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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.