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Finding the Fourth Proportional to 17,679.61, 26,512.35 and 7,811.92

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Solution

The fourth proportional to 17,679.61, 26,512.35 and 7,811.92 is: 11,714.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,679.61 : 26,512.35 = 7,811.92 : x
  2. Step 2: Convert to fraction form
    17,679.61/26,512.35 = 7,811.92/x
  3. Step 3: Cross multiply
    17,679.61x = 26,512.35 × 7,811.92
  4. Step 4: Simplify right side
    17,679.61x = 207,112,357.21
  5. Step 5: Solve for x
    x = 207,112,357.21/17,679.61
  6. Step 6: Final answer
    x = 11,714.76

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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.