Home / 39,806.40-54,934.20-21,902.16

Finding the Fourth Proportional to 39,806.40, 54,934.20 and 21,902.16

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Solution

The fourth proportional to 39,806.40, 54,934.20 and 21,902.16 is: 30,225.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,806.40 : 54,934.20 = 21,902.16 : x
  2. Step 2: Convert to fraction form
    39,806.40/54,934.20 = 21,902.16/x
  3. Step 3: Cross multiply
    39,806.40x = 54,934.20 × 21,902.16
  4. Step 4: Simplify right side
    39,806.40x = 1,203,177,843.88
  5. Step 5: Solve for x
    x = 1,203,177,843.88/39,806.40
  6. Step 6: Final answer
    x = 30,225.74

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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.