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Finding the Fourth Proportional to 11,136.88, 15,383.88 and 8,914.66

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Solution

The fourth proportional to 11,136.88, 15,383.88 and 8,914.66 is: 12,314.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,136.88 : 15,383.88 = 8,914.66 : x
  2. Step 2: Convert to fraction form
    11,136.88/15,383.88 = 8,914.66/x
  3. Step 3: Cross multiply
    11,136.88x = 15,383.88 × 8,914.66
  4. Step 4: Simplify right side
    11,136.88x = 137,142,059.68
  5. Step 5: Solve for x
    x = 137,142,059.68/11,136.88
  6. Step 6: Final answer
    x = 12,314.23

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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.