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Finding the Third Proportional to 21,415.50 and 24,979.50

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Solution

The third proportional to 21,415.50 and 24,979.50 is: 29,136.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,415.50 : 24,979.50 = 24,979.50 : x
  2. Step 2: Convert to fraction form
    21,415.50/24,979.50 = 24,979.50/x
  3. Step 3: Cross multiply
    21,415.50x = 24,979.50 × 24,979.50
  4. Step 4: Simplify right side
    21,415.50x = 623,975,420.25
  5. Step 5: Solve for x
    x = 623,975,420.25/21,415.50
  6. Step 6: Final answer
    x = 29,136.63

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.