Home / 8,687.44-11,989.26-4,909.30

Finding the Fourth Proportional to 8,687.44, 11,989.26 and 4,909.30

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Solution

The fourth proportional to 8,687.44, 11,989.26 and 4,909.30 is: 6,775.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.44 : 11,989.26 = 4,909.30 : x
  2. Step 2: Convert to fraction form
    8,687.44/11,989.26 = 4,909.30/x
  3. Step 3: Cross multiply
    8,687.44x = 11,989.26 × 4,909.30
  4. Step 4: Simplify right side
    8,687.44x = 58,858,874.12
  5. Step 5: Solve for x
    x = 58,858,874.12/8,687.44
  6. Step 6: Final answer
    x = 6,775.17

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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.