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Finding the Third Proportional to 16,920 and 19,458

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Solution

The third proportional to 16,920 and 19,458 is: 22,376.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,920 : 19,458 = 19,458 : x
  2. Step 2: Convert to fraction form
    16,920/19,458 = 19,458/x
  3. Step 3: Cross multiply
    16,920x = 19,458 × 19,458
  4. Step 4: Simplify right side
    16,920x = 378,613,764
  5. Step 5: Solve for x
    x = 378,613,764/16,920
  6. Step 6: Final answer
    x = 22,376.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.