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Finding the Fourth Proportional to 21,055.50, 29,056.50 and 11,623.98

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Solution

The fourth proportional to 21,055.50, 29,056.50 and 11,623.98 is: 16,041.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055.50 : 29,056.50 = 11,623.98 : x
  2. Step 2: Convert to fraction form
    21,055.50/29,056.50 = 11,623.98/x
  3. Step 3: Cross multiply
    21,055.50x = 29,056.50 × 11,623.98
  4. Step 4: Simplify right side
    21,055.50x = 337,752,174.87
  5. Step 5: Solve for x
    x = 337,752,174.87/21,055.50
  6. Step 6: Final answer
    x = 16,041.04

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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.