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Finding the Third Proportional to 21,420 and 46,485

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Solution

The third proportional to 21,420 and 46,485 is: 100,880.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420 : 46,485 = 46,485 : x
  2. Step 2: Convert to fraction form
    21,420/46,485 = 46,485/x
  3. Step 3: Cross multiply
    21,420x = 46,485 × 46,485
  4. Step 4: Simplify right side
    21,420x = 2,160,855,225
  5. Step 5: Solve for x
    x = 2,160,855,225/21,420
  6. Step 6: Final answer
    x = 100,880.26

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.