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Finding the Fourth Proportional to 21,504.92, 29,676.76 and 12,076.52

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Solution

The fourth proportional to 21,504.92, 29,676.76 and 12,076.52 is: 16,665.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,504.92 : 29,676.76 = 12,076.52 : x
  2. Step 2: Convert to fraction form
    21,504.92/29,676.76 = 12,076.52/x
  3. Step 3: Cross multiply
    21,504.92x = 29,676.76 × 12,076.52
  4. Step 4: Simplify right side
    21,504.92x = 358,391,985.68
  5. Step 5: Solve for x
    x = 358,391,985.68/21,504.92
  6. Step 6: Final answer
    x = 16,665.58

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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.