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Finding the Fourth Proportional to 39,797.51, 54,919.98 and 21,891.45

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Solution

The fourth proportional to 39,797.51, 54,919.98 and 21,891.45 is: 30,209.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,797.51 : 54,919.98 = 21,891.45 : x
  2. Step 2: Convert to fraction form
    39,797.51/54,919.98 = 21,891.45/x
  3. Step 3: Cross multiply
    39,797.51x = 54,919.98 × 21,891.45
  4. Step 4: Simplify right side
    39,797.51x = 1,202,277,996.17
  5. Step 5: Solve for x
    x = 1,202,277,996.17/39,797.51
  6. Step 6: Final answer
    x = 30,209.88

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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.