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Finding the Third Proportional to 3,980.81 and 8,424.84

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Solution

The third proportional to 3,980.81 and 8,424.84 is: 17,830.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.81 : 8,424.84 = 8,424.84 : x
  2. Step 2: Convert to fraction form
    3,980.81/8,424.84 = 8,424.84/x
  3. Step 3: Cross multiply
    3,980.81x = 8,424.84 × 8,424.84
  4. Step 4: Simplify right side
    3,980.81x = 70,977,992.21
  5. Step 5: Solve for x
    x = 70,977,992.21/3,980.81
  6. Step 6: Final answer
    x = 17,830.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.