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Finding the Fourth Proportional to 31,668.71, 43,684.04 and 19,729.71

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Solution

The fourth proportional to 31,668.71, 43,684.04 and 19,729.71 is: 27,215.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,668.71 : 43,684.04 = 19,729.71 : x
  2. Step 2: Convert to fraction form
    31,668.71/43,684.04 = 19,729.71/x
  3. Step 3: Cross multiply
    31,668.71x = 43,684.04 × 19,729.71
  4. Step 4: Simplify right side
    31,668.71x = 861,873,490.15
  5. Step 5: Solve for x
    x = 861,873,490.15/31,668.71
  6. Step 6: Final answer
    x = 27,215.31

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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.