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Finding the Third Proportional to 14,240 and 20,790

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Solution

The third proportional to 14,240 and 20,790 is: 30,352.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,240 : 20,790 = 20,790 : x
  2. Step 2: Convert to fraction form
    14,240/20,790 = 20,790/x
  3. Step 3: Cross multiply
    14,240x = 20,790 × 20,790
  4. Step 4: Simplify right side
    14,240x = 432,224,100
  5. Step 5: Solve for x
    x = 432,224,100/14,240
  6. Step 6: Final answer
    x = 30,352.82

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.