Home / 39,781.44-54,898.77-21,876.57

Finding the Fourth Proportional to 39,781.44, 54,898.77 and 21,876.57

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Solution

The fourth proportional to 39,781.44, 54,898.77 and 21,876.57 is: 30,189.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,781.44 : 54,898.77 = 21,876.57 : x
  2. Step 2: Convert to fraction form
    39,781.44/54,898.77 = 21,876.57/x
  3. Step 3: Cross multiply
    39,781.44x = 54,898.77 × 21,876.57
  4. Step 4: Simplify right side
    39,781.44x = 1,200,996,784.82
  5. Step 5: Solve for x
    x = 1,200,996,784.82/39,781.44
  6. Step 6: Final answer
    x = 30,189.88

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1.5x scale

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.