Home / 39,781.11-54,898.34-21,876.24

Finding the Fourth Proportional to 39,781.11, 54,898.34 and 21,876.24

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Solution

The fourth proportional to 39,781.11, 54,898.34 and 21,876.24 is: 30,189.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,781.11 : 54,898.34 = 21,876.24 : x
  2. Step 2: Convert to fraction form
    39,781.11/54,898.34 = 21,876.24/x
  3. Step 3: Cross multiply
    39,781.11x = 54,898.34 × 21,876.24
  4. Step 4: Simplify right side
    39,781.11x = 1,200,969,152.06
  5. Step 5: Solve for x
    x = 1,200,969,152.06/39,781.11
  6. Step 6: Final answer
    x = 30,189.43

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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.