Home / 39,755.79-54,864-21,851.25

Finding the Fourth Proportional to 39,755.79, 54,864 and 21,851.25

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Solution

The fourth proportional to 39,755.79, 54,864 and 21,851.25 is: 30,155.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,755.79 : 54,864 = 21,851.25 : x
  2. Step 2: Convert to fraction form
    39,755.79/54,864 = 21,851.25/x
  3. Step 3: Cross multiply
    39,755.79x = 54,864 × 21,851.25
  4. Step 4: Simplify right side
    39,755.79x = 1,198,846,980
  5. Step 5: Solve for x
    x = 1,198,846,980/39,755.79
  6. Step 6: Final answer
    x = 30,155.28

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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.