Home / 12,136.74-18,199.96-5,119.90

Finding the Fourth Proportional to 12,136.74, 18,199.96 and 5,119.90

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Solution

The fourth proportional to 12,136.74, 18,199.96 and 5,119.90 is: 7,677.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,136.74 : 18,199.96 = 5,119.90 : x
  2. Step 2: Convert to fraction form
    12,136.74/18,199.96 = 5,119.90/x
  3. Step 3: Cross multiply
    12,136.74x = 18,199.96 × 5,119.90
  4. Step 4: Simplify right side
    12,136.74x = 93,181,975.20
  5. Step 5: Solve for x
    x = 93,181,975.20/12,136.74
  6. Step 6: Final answer
    x = 7,677.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.