Home / 13,539.45-18,685.17-8,163.61

Finding the Fourth Proportional to 13,539.45, 18,685.17 and 8,163.61

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Solution

The fourth proportional to 13,539.45, 18,685.17 and 8,163.61 is: 11,266.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,539.45 : 18,685.17 = 8,163.61 : x
  2. Step 2: Convert to fraction form
    13,539.45/18,685.17 = 8,163.61/x
  3. Step 3: Cross multiply
    13,539.45x = 18,685.17 × 8,163.61
  4. Step 4: Simplify right side
    13,539.45x = 152,538,440.66
  5. Step 5: Solve for x
    x = 152,538,440.66/13,539.45
  6. Step 6: Final answer
    x = 11,266.22

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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.