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Finding the Fourth Proportional to 21,043.68, 29,040 and 11,612

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Solution

The fourth proportional to 21,043.68, 29,040 and 11,612 is: 16,024.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,043.68 : 29,040 = 11,612 : x
  2. Step 2: Convert to fraction form
    21,043.68/29,040 = 11,612/x
  3. Step 3: Cross multiply
    21,043.68x = 29,040 × 11,612
  4. Step 4: Simplify right side
    21,043.68x = 337,212,480
  5. Step 5: Solve for x
    x = 337,212,480/21,043.68
  6. Step 6: Final answer
    x = 16,024.41

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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.