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Finding the Fourth Proportional to 10,859.88, 16,272.81 and 8,668.02

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Solution

The fourth proportional to 10,859.88, 16,272.81 and 8,668.02 is: 12,988.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,859.88 : 16,272.81 = 8,668.02 : x
  2. Step 2: Convert to fraction form
    10,859.88/16,272.81 = 8,668.02/x
  3. Step 3: Cross multiply
    10,859.88x = 16,272.81 × 8,668.02
  4. Step 4: Simplify right side
    10,859.88x = 141,053,042.54
  5. Step 5: Solve for x
    x = 141,053,042.54/10,859.88
  6. Step 6: Final answer
    x = 12,988.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.