Home / 20,942.43-31,383.82-10,402.12

Finding the Fourth Proportional to 20,942.43, 31,383.82 and 10,402.12

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Solution

The fourth proportional to 20,942.43, 31,383.82 and 10,402.12 is: 15,588.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.43 : 31,383.82 = 10,402.12 : x
  2. Step 2: Convert to fraction form
    20,942.43/31,383.82 = 10,402.12/x
  3. Step 3: Cross multiply
    20,942.43x = 31,383.82 × 10,402.12
  4. Step 4: Simplify right side
    20,942.43x = 326,458,261.70
  5. Step 5: Solve for x
    x = 326,458,261.70/20,942.43
  6. Step 6: Final answer
    x = 15,588.37

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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.