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Finding the Third Proportional to 3,320 and 6,990.50

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Solution

The third proportional to 3,320 and 6,990.50 is: 14,719.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,320 : 6,990.50 = 6,990.50 : x
  2. Step 2: Convert to fraction form
    3,320/6,990.50 = 6,990.50/x
  3. Step 3: Cross multiply
    3,320x = 6,990.50 × 6,990.50
  4. Step 4: Simplify right side
    3,320x = 48,867,090.25
  5. Step 5: Solve for x
    x = 48,867,090.25/3,320
  6. Step 6: Final answer
    x = 14,719.00

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.