Home / 39,687.12-54,767.88-21,781.32

Finding the Fourth Proportional to 39,687.12, 54,767.88 and 21,781.32

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Solution

The fourth proportional to 39,687.12, 54,767.88 and 21,781.32 is: 30,058.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,687.12 : 54,767.88 = 21,781.32 : x
  2. Step 2: Convert to fraction form
    39,687.12/54,767.88 = 21,781.32/x
  3. Step 3: Cross multiply
    39,687.12x = 54,767.88 × 21,781.32
  4. Step 4: Simplify right side
    39,687.12x = 1,192,916,720.00
  5. Step 5: Solve for x
    x = 1,192,916,720.00/39,687.12
  6. Step 6: Final answer
    x = 30,058.03

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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.