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Finding the Third Proportional to 2,130 and 3,909.75

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Solution

The third proportional to 2,130 and 3,909.75 is: 7,176.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130 : 3,909.75 = 3,909.75 : x
  2. Step 2: Convert to fraction form
    2,130/3,909.75 = 3,909.75/x
  3. Step 3: Cross multiply
    2,130x = 3,909.75 × 3,909.75
  4. Step 4: Simplify right side
    2,130x = 15,286,145.06
  5. Step 5: Solve for x
    x = 15,286,145.06/2,130
  6. Step 6: Final answer
    x = 7,176.59

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Why These Related Problems?

These problems maintain the same ratio (1.84) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.