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Finding the Third Proportional to 8,790 and 13,818

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Solution

The third proportional to 8,790 and 13,818 is: 21,722.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,790 : 13,818 = 13,818 : x
  2. Step 2: Convert to fraction form
    8,790/13,818 = 13,818/x
  3. Step 3: Cross multiply
    8,790x = 13,818 × 13,818
  4. Step 4: Simplify right side
    8,790x = 190,937,124
  5. Step 5: Solve for x
    x = 190,937,124/8,790
  6. Step 6: Final answer
    x = 21,722.08

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.