Home / 39,721.43-54,815.72-21,816.78

Finding the Fourth Proportional to 39,721.43, 54,815.72 and 21,816.78

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Solution

The fourth proportional to 39,721.43, 54,815.72 and 21,816.78 is: 30,107.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.43 : 54,815.72 = 21,816.78 : x
  2. Step 2: Convert to fraction form
    39,721.43/54,815.72 = 21,816.78/x
  3. Step 3: Cross multiply
    39,721.43x = 54,815.72 × 21,816.78
  4. Step 4: Simplify right side
    39,721.43x = 1,195,902,394.70
  5. Step 5: Solve for x
    x = 1,195,902,394.70/39,721.43
  6. Step 6: Final answer
    x = 30,107.24

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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.