Home / 13,145.44-18,136.40-9,369.20

Finding the Fourth Proportional to 13,145.44, 18,136.40 and 9,369.20

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Solution

The fourth proportional to 13,145.44, 18,136.40 and 9,369.20 is: 12,926.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.44 : 18,136.40 = 9,369.20 : x
  2. Step 2: Convert to fraction form
    13,145.44/18,136.40 = 9,369.20/x
  3. Step 3: Cross multiply
    13,145.44x = 18,136.40 × 9,369.20
  4. Step 4: Simplify right side
    13,145.44x = 169,923,558.88
  5. Step 5: Solve for x
    x = 169,923,558.88/13,145.44
  6. Step 6: Final answer
    x = 12,926.43

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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.