Home / 13,227.76-18,122.22-12,729.60

Finding the Fourth Proportional to 13,227.76, 18,122.22 and 12,729.60

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Solution

The fourth proportional to 13,227.76, 18,122.22 and 12,729.60 is: 17,439.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,227.76 : 18,122.22 = 12,729.60 : x
  2. Step 2: Convert to fraction form
    13,227.76/18,122.22 = 12,729.60/x
  3. Step 3: Cross multiply
    13,227.76x = 18,122.22 × 12,729.60
  4. Step 4: Simplify right side
    13,227.76x = 230,688,611.71
  5. Step 5: Solve for x
    x = 230,688,611.71/13,227.76
  6. Step 6: Final answer
    x = 17,439.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.