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Finding the Third Proportional to 8,460 and 18,240

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Solution

The third proportional to 8,460 and 18,240 is: 39,325.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,460 : 18,240 = 18,240 : x
  2. Step 2: Convert to fraction form
    8,460/18,240 = 18,240/x
  3. Step 3: Cross multiply
    8,460x = 18,240 × 18,240
  4. Step 4: Simplify right side
    8,460x = 332,697,600
  5. Step 5: Solve for x
    x = 332,697,600/8,460
  6. Step 6: Final answer
    x = 39,325.96

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.