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Finding the Third Proportional to 3,905 and 8,477.50

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Solution

The third proportional to 3,905 and 8,477.50 is: 18,404.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905 : 8,477.50 = 8,477.50 : x
  2. Step 2: Convert to fraction form
    3,905/8,477.50 = 8,477.50/x
  3. Step 3: Cross multiply
    3,905x = 8,477.50 × 8,477.50
  4. Step 4: Simplify right side
    3,905x = 71,868,006.25
  5. Step 5: Solve for x
    x = 71,868,006.25/3,905
  6. Step 6: Final answer
    x = 18,404.10

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.