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Finding the Fourth Proportional to 21,057.12, 29,059.20 and 11,625.12

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Solution

The fourth proportional to 21,057.12, 29,059.20 and 11,625.12 is: 16,042.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,057.12 : 29,059.20 = 11,625.12 : x
  2. Step 2: Convert to fraction form
    21,057.12/29,059.20 = 11,625.12/x
  3. Step 3: Cross multiply
    21,057.12x = 29,059.20 × 11,625.12
  4. Step 4: Simplify right side
    21,057.12x = 337,816,687.10
  5. Step 5: Solve for x
    x = 337,816,687.10/21,057.12
  6. Step 6: Final answer
    x = 16,042.87

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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.