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Finding the Third Proportional to 4,311 and 9,139

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Solution

The third proportional to 4,311 and 9,139 is: 19,374.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,311 : 9,139 = 9,139 : x
  2. Step 2: Convert to fraction form
    4,311/9,139 = 9,139/x
  3. Step 3: Cross multiply
    4,311x = 9,139 × 9,139
  4. Step 4: Simplify right side
    4,311x = 83,521,321
  5. Step 5: Solve for x
    x = 83,521,321/4,311
  6. Step 6: Final answer
    x = 19,374.00

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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.