Home / 20,864.21-31,286.60-12,101.63

Finding the Fourth Proportional to 20,864.21, 31,286.60 and 12,101.63

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Solution

The fourth proportional to 20,864.21, 31,286.60 and 12,101.63 is: 18,146.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.21 : 31,286.60 = 12,101.63 : x
  2. Step 2: Convert to fraction form
    20,864.21/31,286.60 = 12,101.63/x
  3. Step 3: Cross multiply
    20,864.21x = 31,286.60 × 12,101.63
  4. Step 4: Simplify right side
    20,864.21x = 378,618,796.65
  5. Step 5: Solve for x
    x = 378,618,796.65/20,864.21
  6. Step 6: Final answer
    x = 18,146.81

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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.