Home / 30,906.43-42,638.81-20,163.94

Finding the Fourth Proportional to 30,906.43, 42,638.81 and 20,163.94

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Solution

The fourth proportional to 30,906.43, 42,638.81 and 20,163.94 is: 27,818.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,906.43 : 42,638.81 = 20,163.94 : x
  2. Step 2: Convert to fraction form
    30,906.43/42,638.81 = 20,163.94/x
  3. Step 3: Cross multiply
    30,906.43x = 42,638.81 × 20,163.94
  4. Step 4: Simplify right side
    30,906.43x = 859,766,199.09
  5. Step 5: Solve for x
    x = 859,766,199.09/30,906.43
  6. Step 6: Final answer
    x = 27,818.36

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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.