Home / 39,759.16-54,867.78-21,855.72

Finding the Fourth Proportional to 39,759.16, 54,867.78 and 21,855.72

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Solution

The fourth proportional to 39,759.16, 54,867.78 and 21,855.72 is: 30,160.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,759.16 : 54,867.78 = 21,855.72 : x
  2. Step 2: Convert to fraction form
    39,759.16/54,867.78 = 21,855.72/x
  3. Step 3: Cross multiply
    39,759.16x = 54,867.78 × 21,855.72
  4. Step 4: Simplify right side
    39,759.16x = 1,199,174,836.70
  5. Step 5: Solve for x
    x = 1,199,174,836.70/39,759.16
  6. Step 6: Final answer
    x = 30,160.97

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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.