Home / 43,121.38-64,684.80-13,540.38

Finding the Fourth Proportional to 43,121.38, 64,684.80 and 13,540.38

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Solution

The fourth proportional to 43,121.38, 64,684.80 and 13,540.38 is: 20,311.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,121.38 : 64,684.80 = 13,540.38 : x
  2. Step 2: Convert to fraction form
    43,121.38/64,684.80 = 13,540.38/x
  3. Step 3: Cross multiply
    43,121.38x = 64,684.80 × 13,540.38
  4. Step 4: Simplify right side
    43,121.38x = 875,856,601.58
  5. Step 5: Solve for x
    x = 875,856,601.58/43,121.38
  6. Step 6: Final answer
    x = 20,311.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.