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Finding the Fourth Proportional to 39,943, 55,121.34 and 22,279

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Solution

The fourth proportional to 39,943, 55,121.34 and 22,279 is: 30,745.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,943 : 55,121.34 = 22,279 : x
  2. Step 2: Convert to fraction form
    39,943/55,121.34 = 22,279/x
  3. Step 3: Cross multiply
    39,943x = 55,121.34 × 22,279
  4. Step 4: Simplify right side
    39,943x = 1,228,048,333.86
  5. Step 5: Solve for x
    x = 1,228,048,333.86/39,943
  6. Step 6: Final answer
    x = 30,745.02

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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.