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Finding the Third Proportional to 15,420 and 31,344

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Solution

The third proportional to 15,420 and 31,344 is: 63,712.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420 : 31,344 = 31,344 : x
  2. Step 2: Convert to fraction form
    15,420/31,344 = 31,344/x
  3. Step 3: Cross multiply
    15,420x = 31,344 × 31,344
  4. Step 4: Simplify right side
    15,420x = 982,446,336
  5. Step 5: Solve for x
    x = 982,446,336/15,420
  6. Step 6: Final answer
    x = 63,712.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.