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Finding the Third Proportional to 7,158 and 15,378

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Solution

The third proportional to 7,158 and 15,378 is: 33,037.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,158 : 15,378 = 15,378 : x
  2. Step 2: Convert to fraction form
    7,158/15,378 = 15,378/x
  3. Step 3: Cross multiply
    7,158x = 15,378 × 15,378
  4. Step 4: Simplify right side
    7,158x = 236,482,884
  5. Step 5: Solve for x
    x = 236,482,884/7,158
  6. Step 6: Final answer
    x = 33,037.56

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.