Home / 39,759.79-54,869.52-21,855.25

Finding the Fourth Proportional to 39,759.79, 54,869.52 and 21,855.25

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Solution

The fourth proportional to 39,759.79, 54,869.52 and 21,855.25 is: 30,160.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,759.79 : 54,869.52 = 21,855.25 : x
  2. Step 2: Convert to fraction form
    39,759.79/54,869.52 = 21,855.25/x
  3. Step 3: Cross multiply
    39,759.79x = 54,869.52 × 21,855.25
  4. Step 4: Simplify right side
    39,759.79x = 1,199,187,076.98
  5. Step 5: Solve for x
    x = 1,199,187,076.98/39,759.79
  6. Step 6: Final answer
    x = 30,160.80

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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.