Home / 20,729.60-28,611.47-13,174.46

Finding the Fourth Proportional to 20,729.60, 28,611.47 and 13,174.46

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Solution

The fourth proportional to 20,729.60, 28,611.47 and 13,174.46 is: 18,183.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.60 : 28,611.47 = 13,174.46 : x
  2. Step 2: Convert to fraction form
    20,729.60/28,611.47 = 13,174.46/x
  3. Step 3: Cross multiply
    20,729.60x = 28,611.47 × 13,174.46
  4. Step 4: Simplify right side
    20,729.60x = 376,940,672.71
  5. Step 5: Solve for x
    x = 376,940,672.71/20,729.60
  6. Step 6: Final answer
    x = 18,183.69

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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.