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Finding the Fourth Proportional to 11,485.78, 15,854.37 and 6,769.75

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Solution

The fourth proportional to 11,485.78, 15,854.37 and 6,769.75 is: 9,344.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,485.78 : 15,854.37 = 6,769.75 : x
  2. Step 2: Convert to fraction form
    11,485.78/15,854.37 = 6,769.75/x
  3. Step 3: Cross multiply
    11,485.78x = 15,854.37 × 6,769.75
  4. Step 4: Simplify right side
    11,485.78x = 107,330,121.31
  5. Step 5: Solve for x
    x = 107,330,121.31/11,485.78
  6. Step 6: Final answer
    x = 9,344.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.