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Finding the Fourth Proportional to 21,674.52, 29,910.87 and 12,243.11

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Solution

The fourth proportional to 21,674.52, 29,910.87 and 12,243.11 is: 16,895.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,674.52 : 29,910.87 = 12,243.11 : x
  2. Step 2: Convert to fraction form
    21,674.52/29,910.87 = 12,243.11/x
  3. Step 3: Cross multiply
    21,674.52x = 29,910.87 × 12,243.11
  4. Step 4: Simplify right side
    21,674.52x = 366,201,922.05
  5. Step 5: Solve for x
    x = 366,201,922.05/21,674.52
  6. Step 6: Final answer
    x = 16,895.50

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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.