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Finding the Third Proportional to 3,120 and 7,590

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Solution

The third proportional to 3,120 and 7,590 is: 18,464.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120 : 7,590 = 7,590 : x
  2. Step 2: Convert to fraction form
    3,120/7,590 = 7,590/x
  3. Step 3: Cross multiply
    3,120x = 7,590 × 7,590
  4. Step 4: Simplify right side
    3,120x = 57,608,100
  5. Step 5: Solve for x
    x = 57,608,100/3,120
  6. Step 6: Final answer
    x = 18,464.13

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Why These Related Problems?

These problems maintain the same ratio (2.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.