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Finding the Fourth Proportional to 17,291.76, 25,945.74 and 8,521.89

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Solution

The fourth proportional to 17,291.76, 25,945.74 and 8,521.89 is: 12,786.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,291.76 : 25,945.74 = 8,521.89 : x
  2. Step 2: Convert to fraction form
    17,291.76/25,945.74 = 8,521.89/x
  3. Step 3: Cross multiply
    17,291.76x = 25,945.74 × 8,521.89
  4. Step 4: Simplify right side
    17,291.76x = 221,106,742.25
  5. Step 5: Solve for x
    x = 221,106,742.25/17,291.76
  6. Step 6: Final answer
    x = 12,786.83

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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.