Home / 39,781.28-54,898.36-21,877.44

Finding the Fourth Proportional to 39,781.28, 54,898.36 and 21,877.44

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Solution

The fourth proportional to 39,781.28, 54,898.36 and 21,877.44 is: 30,190.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,781.28 : 54,898.36 = 21,877.44 : x
  2. Step 2: Convert to fraction form
    39,781.28/54,898.36 = 21,877.44/x
  3. Step 3: Cross multiply
    39,781.28x = 54,898.36 × 21,877.44
  4. Step 4: Simplify right side
    39,781.28x = 1,201,035,577.00
  5. Step 5: Solve for x
    x = 1,201,035,577.00/39,781.28
  6. Step 6: Final answer
    x = 30,190.97

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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.