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Finding the Fourth Proportional to 21,732, 29,991.36 and 12,301.44

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Solution

The fourth proportional to 21,732, 29,991.36 and 12,301.44 is: 16,976.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,732 : 29,991.36 = 12,301.44 : x
  2. Step 2: Convert to fraction form
    21,732/29,991.36 = 12,301.44/x
  3. Step 3: Cross multiply
    21,732x = 29,991.36 × 12,301.44
  4. Step 4: Simplify right side
    21,732x = 368,936,915.56
  5. Step 5: Solve for x
    x = 368,936,915.56/21,732
  6. Step 6: Final answer
    x = 16,976.67

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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.