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Finding the Third Proportional to 4,290 and 11,145

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Solution

The third proportional to 4,290 and 11,145 is: 28,953.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,290 : 11,145 = 11,145 : x
  2. Step 2: Convert to fraction form
    4,290/11,145 = 11,145/x
  3. Step 3: Cross multiply
    4,290x = 11,145 × 11,145
  4. Step 4: Simplify right side
    4,290x = 124,211,025
  5. Step 5: Solve for x
    x = 124,211,025/4,290
  6. Step 6: Final answer
    x = 28,953.62

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Why These Related Problems?

These problems maintain the same ratio (2.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.