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Finding the Third Proportional to 6,490 and 14,420

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Solution

The third proportional to 6,490 and 14,420 is: 32,039.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,490 : 14,420 = 14,420 : x
  2. Step 2: Convert to fraction form
    6,490/14,420 = 14,420/x
  3. Step 3: Cross multiply
    6,490x = 14,420 × 14,420
  4. Step 4: Simplify right side
    6,490x = 207,936,400
  5. Step 5: Solve for x
    x = 207,936,400/6,490
  6. Step 6: Final answer
    x = 32,039.51

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.