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Finding the Fourth Proportional to 13,396.98, 20,079.54 and 10,099.20

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Solution

The fourth proportional to 13,396.98, 20,079.54 and 10,099.20 is: 15,136.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,396.98 : 20,079.54 = 10,099.20 : x
  2. Step 2: Convert to fraction form
    13,396.98/20,079.54 = 10,099.20/x
  3. Step 3: Cross multiply
    13,396.98x = 20,079.54 × 10,099.20
  4. Step 4: Simplify right side
    13,396.98x = 202,787,290.37
  5. Step 5: Solve for x
    x = 202,787,290.37/13,396.98
  6. Step 6: Final answer
    x = 15,136.79

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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.