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Finding the Third Proportional to 7,638.50 and 16,511

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Solution

The third proportional to 7,638.50 and 16,511 is: 35,689.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,638.50 : 16,511 = 16,511 : x
  2. Step 2: Convert to fraction form
    7,638.50/16,511 = 16,511/x
  3. Step 3: Cross multiply
    7,638.50x = 16,511 × 16,511
  4. Step 4: Simplify right side
    7,638.50x = 272,613,121
  5. Step 5: Solve for x
    x = 272,613,121/7,638.50
  6. Step 6: Final answer
    x = 35,689.35

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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.