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Finding the Third Proportional to 15,663 and 21,478.50

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Solution

The third proportional to 15,663 and 21,478.50 is: 29,453.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,663 : 21,478.50 = 21,478.50 : x
  2. Step 2: Convert to fraction form
    15,663/21,478.50 = 21,478.50/x
  3. Step 3: Cross multiply
    15,663x = 21,478.50 × 21,478.50
  4. Step 4: Simplify right side
    15,663x = 461,325,962.25
  5. Step 5: Solve for x
    x = 461,325,962.25/15,663
  6. Step 6: Final answer
    x = 29,453.23

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.