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Finding the Fourth Proportional to 21,676.94, 29,916.61 and 12,246.11

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Solution

The fourth proportional to 21,676.94, 29,916.61 and 12,246.11 is: 16,901.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,676.94 : 29,916.61 = 12,246.11 : x
  2. Step 2: Convert to fraction form
    21,676.94/29,916.61 = 12,246.11/x
  3. Step 3: Cross multiply
    21,676.94x = 29,916.61 × 12,246.11
  4. Step 4: Simplify right side
    21,676.94x = 366,362,035.66
  5. Step 5: Solve for x
    x = 366,362,035.66/21,676.94
  6. Step 6: Final answer
    x = 16,901.00

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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.