Home / 13,725.36-18,942.12-8,136.72

Finding the Fourth Proportional to 13,725.36, 18,942.12 and 8,136.72

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Solution

The fourth proportional to 13,725.36, 18,942.12 and 8,136.72 is: 11,229.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,725.36 : 18,942.12 = 8,136.72 : x
  2. Step 2: Convert to fraction form
    13,725.36/18,942.12 = 8,136.72/x
  3. Step 3: Cross multiply
    13,725.36x = 18,942.12 × 8,136.72
  4. Step 4: Simplify right side
    13,725.36x = 154,126,726.65
  5. Step 5: Solve for x
    x = 154,126,726.65/13,725.36
  6. Step 6: Final answer
    x = 11,229.34

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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.