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Finding the Third Proportional to 7,421 and 11,558

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Solution

The third proportional to 7,421 and 11,558 is: 18,001.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421 : 11,558 = 11,558 : x
  2. Step 2: Convert to fraction form
    7,421/11,558 = 11,558/x
  3. Step 3: Cross multiply
    7,421x = 11,558 × 11,558
  4. Step 4: Simplify right side
    7,421x = 133,587,364
  5. Step 5: Solve for x
    x = 133,587,364/7,421
  6. Step 6: Final answer
    x = 18,001.26

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.