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Finding the Fourth Proportional to 15,701.36, 21,668.36 and 8,628

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Solution

The fourth proportional to 15,701.36, 21,668.36 and 8,628 is: 11,906.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,701.36 : 21,668.36 = 8,628 : x
  2. Step 2: Convert to fraction form
    15,701.36/21,668.36 = 8,628/x
  3. Step 3: Cross multiply
    15,701.36x = 21,668.36 × 8,628
  4. Step 4: Simplify right side
    15,701.36x = 186,954,610.08
  5. Step 5: Solve for x
    x = 186,954,610.08/15,701.36
  6. Step 6: Final answer
    x = 11,906.91

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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.