Home / 31,629.56-43,684.65-21,540.47

Finding the Fourth Proportional to 31,629.56, 43,684.65 and 21,540.47

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Solution

The fourth proportional to 31,629.56, 43,684.65 and 21,540.47 is: 29,750.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,629.56 : 43,684.65 = 21,540.47 : x
  2. Step 2: Convert to fraction form
    31,629.56/43,684.65 = 21,540.47/x
  3. Step 3: Cross multiply
    31,629.56x = 43,684.65 × 21,540.47
  4. Step 4: Simplify right side
    31,629.56x = 940,987,674.36
  5. Step 5: Solve for x
    x = 940,987,674.36/31,629.56
  6. Step 6: Final answer
    x = 29,750.27

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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.