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Finding the Fourth Proportional to 8,691.02, 11,993.79 and 5,108.60

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Solution

The fourth proportional to 8,691.02, 11,993.79 and 5,108.60 is: 7,049.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.02 : 11,993.79 = 5,108.60 : x
  2. Step 2: Convert to fraction form
    8,691.02/11,993.79 = 5,108.60/x
  3. Step 3: Cross multiply
    8,691.02x = 11,993.79 × 5,108.60
  4. Step 4: Simplify right side
    8,691.02x = 61,271,415.63
  5. Step 5: Solve for x
    x = 61,271,415.63/8,691.02
  6. Step 6: Final answer
    x = 7,049.97

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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.