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Finding the Third Proportional to 17,220 and 20,148

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Solution

The third proportional to 17,220 and 20,148 is: 23,573.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,220 : 20,148 = 20,148 : x
  2. Step 2: Convert to fraction form
    17,220/20,148 = 20,148/x
  3. Step 3: Cross multiply
    17,220x = 20,148 × 20,148
  4. Step 4: Simplify right side
    17,220x = 405,941,904
  5. Step 5: Solve for x
    x = 405,941,904/17,220
  6. Step 6: Final answer
    x = 23,573.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.