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Finding the Fourth Proportional to 39,759.80, 54,869.54 and 21,855.26

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Solution

The fourth proportional to 39,759.80, 54,869.54 and 21,855.26 is: 30,160.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,759.80 : 54,869.54 = 21,855.26 : x
  2. Step 2: Convert to fraction form
    39,759.80/54,869.54 = 21,855.26/x
  3. Step 3: Cross multiply
    39,759.80x = 54,869.54 × 21,855.26
  4. Step 4: Simplify right side
    39,759.80x = 1,199,188,062.78
  5. Step 5: Solve for x
    x = 1,199,188,062.78/39,759.80
  6. Step 6: Final answer
    x = 30,160.82

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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.