Home / 13,110.75-18,087.71-8,636.85

Finding the Fourth Proportional to 13,110.75, 18,087.71 and 8,636.85

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Solution

The fourth proportional to 13,110.75, 18,087.71 and 8,636.85 is: 11,915.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,110.75 : 18,087.71 = 8,636.85 : x
  2. Step 2: Convert to fraction form
    13,110.75/18,087.71 = 8,636.85/x
  3. Step 3: Cross multiply
    13,110.75x = 18,087.71 × 8,636.85
  4. Step 4: Simplify right side
    13,110.75x = 156,220,794.93
  5. Step 5: Solve for x
    x = 156,220,794.93/13,110.75
  6. Step 6: Final answer
    x = 11,915.47

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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.