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Finding the Third Proportional to 21,360 and 28,560

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Solution

The third proportional to 21,360 and 28,560 is: 38,186.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,360 : 28,560 = 28,560 : x
  2. Step 2: Convert to fraction form
    21,360/28,560 = 28,560/x
  3. Step 3: Cross multiply
    21,360x = 28,560 × 28,560
  4. Step 4: Simplify right side
    21,360x = 815,673,600
  5. Step 5: Solve for x
    x = 815,673,600/21,360
  6. Step 6: Final answer
    x = 38,186.97

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.