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Finding the Fourth Proportional to 21,638.44, 29,861.14 and 11,702.44

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Solution

The fourth proportional to 21,638.44, 29,861.14 and 11,702.44 is: 16,149.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,638.44 : 29,861.14 = 11,702.44 : x
  2. Step 2: Convert to fraction form
    21,638.44/29,861.14 = 11,702.44/x
  3. Step 3: Cross multiply
    21,638.44x = 29,861.14 × 11,702.44
  4. Step 4: Simplify right side
    21,638.44x = 349,448,095.27
  5. Step 5: Solve for x
    x = 349,448,095.27/21,638.44
  6. Step 6: Final answer
    x = 16,149.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.