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Finding the Fourth Proportional to 21,616.44, 29,830.44 and 12,188.04

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Solution

The fourth proportional to 21,616.44, 29,830.44 and 12,188.04 is: 16,819.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,616.44 : 29,830.44 = 12,188.04 : x
  2. Step 2: Convert to fraction form
    21,616.44/29,830.44 = 12,188.04/x
  3. Step 3: Cross multiply
    21,616.44x = 29,830.44 × 12,188.04
  4. Step 4: Simplify right side
    21,616.44x = 363,574,595.94
  5. Step 5: Solve for x
    x = 363,574,595.94/21,616.44
  6. Step 6: Final answer
    x = 16,819.36

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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.