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Finding the Fourth Proportional to 21,679.91, 32,512.95 and 6,885.37

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Solution

The fourth proportional to 21,679.91, 32,512.95 and 6,885.37 is: 10,325.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,679.91 : 32,512.95 = 6,885.37 : x
  2. Step 2: Convert to fraction form
    21,679.91/32,512.95 = 6,885.37/x
  3. Step 3: Cross multiply
    21,679.91x = 32,512.95 × 6,885.37
  4. Step 4: Simplify right side
    21,679.91x = 223,863,675.78
  5. Step 5: Solve for x
    x = 223,863,675.78/21,679.91
  6. Step 6: Final answer
    x = 10,325.86

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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.