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Finding the Third Proportional to 7,240 and 11,518

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Solution

The third proportional to 7,240 and 11,518 is: 18,323.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,240 : 11,518 = 11,518 : x
  2. Step 2: Convert to fraction form
    7,240/11,518 = 11,518/x
  3. Step 3: Cross multiply
    7,240x = 11,518 × 11,518
  4. Step 4: Simplify right side
    7,240x = 132,664,324
  5. Step 5: Solve for x
    x = 132,664,324/7,240
  6. Step 6: Final answer
    x = 18,323.80

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.