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Finding the Fourth Proportional to 8,786.55, 12,136.82 and 7,119.03

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Solution

The fourth proportional to 8,786.55, 12,136.82 and 7,119.03 is: 9,833.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,786.55 : 12,136.82 = 7,119.03 : x
  2. Step 2: Convert to fraction form
    8,786.55/12,136.82 = 7,119.03/x
  3. Step 3: Cross multiply
    8,786.55x = 12,136.82 × 7,119.03
  4. Step 4: Simplify right side
    8,786.55x = 86,402,350.09
  5. Step 5: Solve for x
    x = 86,402,350.09/8,786.55
  6. Step 6: Final answer
    x = 9,833.48

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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.