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Finding the Fourth Proportional to 21,529, 29,699.94 and 15,244.84

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Solution

The fourth proportional to 21,529, 29,699.94 and 15,244.84 is: 21,030.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,529 : 29,699.94 = 15,244.84 : x
  2. Step 2: Convert to fraction form
    21,529/29,699.94 = 15,244.84/x
  3. Step 3: Cross multiply
    21,529x = 29,699.94 × 15,244.84
  4. Step 4: Simplify right side
    21,529x = 452,770,833.31
  5. Step 5: Solve for x
    x = 452,770,833.31/21,529
  6. Step 6: Final answer
    x = 21,030.74

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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.