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Finding the Fourth Proportional to 8,672.94, 11,968.56 and 5,136.21

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Solution

The fourth proportional to 8,672.94, 11,968.56 and 5,136.21 is: 7,087.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,672.94 : 11,968.56 = 5,136.21 : x
  2. Step 2: Convert to fraction form
    8,672.94/11,968.56 = 5,136.21/x
  3. Step 3: Cross multiply
    8,672.94x = 11,968.56 × 5,136.21
  4. Step 4: Simplify right side
    8,672.94x = 61,473,037.56
  5. Step 5: Solve for x
    x = 61,473,037.56/8,672.94
  6. Step 6: Final answer
    x = 7,087.91

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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.