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Finding the Fourth Proportional to 6,456.75, 9,686.75 and 1,839.75

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Solution

The fourth proportional to 6,456.75, 9,686.75 and 1,839.75 is: 2,760.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,456.75 : 9,686.75 = 1,839.75 : x
  2. Step 2: Convert to fraction form
    6,456.75/9,686.75 = 1,839.75/x
  3. Step 3: Cross multiply
    6,456.75x = 9,686.75 × 1,839.75
  4. Step 4: Simplify right side
    6,456.75x = 17,821,189.11
  5. Step 5: Solve for x
    x = 17,821,189.11/6,456.75
  6. Step 6: Final answer
    x = 2,760.09

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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.