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Finding the Fourth Proportional to 7,871.72, 11,807.86 and 2,676.92

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Solution

The fourth proportional to 7,871.72, 11,807.86 and 2,676.92 is: 4,015.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871.72 : 11,807.86 = 2,676.92 : x
  2. Step 2: Convert to fraction form
    7,871.72/11,807.86 = 2,676.92/x
  3. Step 3: Cross multiply
    7,871.72x = 11,807.86 × 2,676.92
  4. Step 4: Simplify right side
    7,871.72x = 31,608,696.59
  5. Step 5: Solve for x
    x = 31,608,696.59/7,871.72
  6. Step 6: Final answer
    x = 4,015.48

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1.5x scale

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.