Home / 39,721.20-54,815.13-21,817.32

Finding the Fourth Proportional to 39,721.20, 54,815.13 and 21,817.32

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Solution

The fourth proportional to 39,721.20, 54,815.13 and 21,817.32 is: 30,107.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.20 : 54,815.13 = 21,817.32 : x
  2. Step 2: Convert to fraction form
    39,721.20/54,815.13 = 21,817.32/x
  3. Step 3: Cross multiply
    39,721.20x = 54,815.13 × 21,817.32
  4. Step 4: Simplify right side
    39,721.20x = 1,195,919,232.05
  5. Step 5: Solve for x
    x = 1,195,919,232.05/39,721.20
  6. Step 6: Final answer
    x = 30,107.83

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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.