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Finding the Fourth Proportional to 27,668.88, 38,087.04 and 20,942.64

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Solution

The fourth proportional to 27,668.88, 38,087.04 and 20,942.64 is: 28,828.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,668.88 : 38,087.04 = 20,942.64 : x
  2. Step 2: Convert to fraction form
    27,668.88/38,087.04 = 20,942.64/x
  3. Step 3: Cross multiply
    27,668.88x = 38,087.04 × 20,942.64
  4. Step 4: Simplify right side
    27,668.88x = 797,643,167.39
  5. Step 5: Solve for x
    x = 797,643,167.39/27,668.88
  6. Step 6: Final answer
    x = 28,828.17

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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.