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Finding the Third Proportional to 6,987.75 and 10,386.75

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Solution

The third proportional to 6,987.75 and 10,386.75 is: 15,439.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987.75 : 10,386.75 = 10,386.75 : x
  2. Step 2: Convert to fraction form
    6,987.75/10,386.75 = 10,386.75/x
  3. Step 3: Cross multiply
    6,987.75x = 10,386.75 × 10,386.75
  4. Step 4: Simplify right side
    6,987.75x = 107,884,575.56
  5. Step 5: Solve for x
    x = 107,884,575.56/6,987.75
  6. Step 6: Final answer
    x = 15,439.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.