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Finding the Third Proportional to 7,810 and 11,710

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Solution

The third proportional to 7,810 and 11,710 is: 17,557.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,810 : 11,710 = 11,710 : x
  2. Step 2: Convert to fraction form
    7,810/11,710 = 11,710/x
  3. Step 3: Cross multiply
    7,810x = 11,710 × 11,710
  4. Step 4: Simplify right side
    7,810x = 137,124,100
  5. Step 5: Solve for x
    x = 137,124,100/7,810
  6. Step 6: Final answer
    x = 17,557.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.