Home / 39,720.98-54,815.94-21,817.65

Finding the Fourth Proportional to 39,720.98, 54,815.94 and 21,817.65

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Solution

The fourth proportional to 39,720.98, 54,815.94 and 21,817.65 is: 30,108.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,720.98 : 54,815.94 = 21,817.65 : x
  2. Step 2: Convert to fraction form
    39,720.98/54,815.94 = 21,817.65/x
  3. Step 3: Cross multiply
    39,720.98x = 54,815.94 × 21,817.65
  4. Step 4: Simplify right side
    39,720.98x = 1,195,955,198.90
  5. Step 5: Solve for x
    x = 1,195,955,198.90/39,720.98
  6. Step 6: Final answer
    x = 30,108.90

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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.