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Finding the Fourth Proportional to 8,643.88, 11,911.98 and 5,986.36

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Solution

The fourth proportional to 8,643.88, 11,911.98 and 5,986.36 is: 8,249.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.88 : 11,911.98 = 5,986.36 : x
  2. Step 2: Convert to fraction form
    8,643.88/11,911.98 = 5,986.36/x
  3. Step 3: Cross multiply
    8,643.88x = 11,911.98 × 5,986.36
  4. Step 4: Simplify right side
    8,643.88x = 71,309,400.59
  5. Step 5: Solve for x
    x = 71,309,400.59/8,643.88
  6. Step 6: Final answer
    x = 8,249.70

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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.