Home / 39,657.98-54,728.74-21,753.90

Finding the Fourth Proportional to 39,657.98, 54,728.74 and 21,753.90

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Solution

The fourth proportional to 39,657.98, 54,728.74 and 21,753.90 is: 30,020.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,657.98 : 54,728.74 = 21,753.90 : x
  2. Step 2: Convert to fraction form
    39,657.98/54,728.74 = 21,753.90/x
  3. Step 3: Cross multiply
    39,657.98x = 54,728.74 × 21,753.90
  4. Step 4: Simplify right side
    39,657.98x = 1,190,563,537.09
  5. Step 5: Solve for x
    x = 1,190,563,537.09/39,657.98
  6. Step 6: Final answer
    x = 30,020.78

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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.