Home / 39,818.40-54,949.68-21,912.96

Finding the Fourth Proportional to 39,818.40, 54,949.68 and 21,912.96

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Solution

The fourth proportional to 39,818.40, 54,949.68 and 21,912.96 is: 30,240.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,818.40 : 54,949.68 = 21,912.96 : x
  2. Step 2: Convert to fraction form
    39,818.40/54,949.68 = 21,912.96/x
  3. Step 3: Cross multiply
    39,818.40x = 54,949.68 × 21,912.96
  4. Step 4: Simplify right side
    39,818.40x = 1,204,110,139.85
  5. Step 5: Solve for x
    x = 1,204,110,139.85/39,818.40
  6. Step 6: Final answer
    x = 30,240.04

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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.