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Finding the Fourth Proportional to 21,324.88, 29,424.96 and 12,824.96

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Solution

The fourth proportional to 21,324.88, 29,424.96 and 12,824.96 is: 17,696.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,324.88 : 29,424.96 = 12,824.96 : x
  2. Step 2: Convert to fraction form
    21,324.88/29,424.96 = 12,824.96/x
  3. Step 3: Cross multiply
    21,324.88x = 29,424.96 × 12,824.96
  4. Step 4: Simplify right side
    21,324.88x = 377,373,935.00
  5. Step 5: Solve for x
    x = 377,373,935.00/21,324.88
  6. Step 6: Final answer
    x = 17,696.42

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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.