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Finding the Fourth Proportional to 12,136.99, 18,208.08 and 6,874.49

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Solution

The fourth proportional to 12,136.99, 18,208.08 and 6,874.49 is: 10,313.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,136.99 : 18,208.08 = 6,874.49 : x
  2. Step 2: Convert to fraction form
    12,136.99/18,208.08 = 6,874.49/x
  3. Step 3: Cross multiply
    12,136.99x = 18,208.08 × 6,874.49
  4. Step 4: Simplify right side
    12,136.99x = 125,171,172.84
  5. Step 5: Solve for x
    x = 125,171,172.84/12,136.99
  6. Step 6: Final answer
    x = 10,313.20

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Similar ratio
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1.5x scale

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.