Home / 13,163.46-18,170.61-8,128.50

Finding the Fourth Proportional to 13,163.46, 18,170.61 and 8,128.50

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Solution

The fourth proportional to 13,163.46, 18,170.61 and 8,128.50 is: 11,220.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,163.46 : 18,170.61 = 8,128.50 : x
  2. Step 2: Convert to fraction form
    13,163.46/18,170.61 = 8,128.50/x
  3. Step 3: Cross multiply
    13,163.46x = 18,170.61 × 8,128.50
  4. Step 4: Simplify right side
    13,163.46x = 147,699,803.39
  5. Step 5: Solve for x
    x = 147,699,803.39/13,163.46
  6. Step 6: Final answer
    x = 11,220.44

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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.