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Finding the Fourth Proportional to 17,687.80, 26,493.30 and 14,615.80

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Solution

The fourth proportional to 17,687.80, 26,493.30 and 14,615.80 is: 21,891.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,687.80 : 26,493.30 = 14,615.80 : x
  2. Step 2: Convert to fraction form
    17,687.80/26,493.30 = 14,615.80/x
  3. Step 3: Cross multiply
    17,687.80x = 26,493.30 × 14,615.80
  4. Step 4: Simplify right side
    17,687.80x = 387,220,774.14
  5. Step 5: Solve for x
    x = 387,220,774.14/17,687.80
  6. Step 6: Final answer
    x = 21,891.97

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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.