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Finding the Third Proportional to 8,790 and 13,511

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Solution

The third proportional to 8,790 and 13,511 is: 20,767.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,790 : 13,511 = 13,511 : x
  2. Step 2: Convert to fraction form
    8,790/13,511 = 13,511/x
  3. Step 3: Cross multiply
    8,790x = 13,511 × 13,511
  4. Step 4: Simplify right side
    8,790x = 182,547,121
  5. Step 5: Solve for x
    x = 182,547,121/8,790
  6. Step 6: Final answer
    x = 20,767.59

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.