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Finding the Fourth Proportional to 39,943.70, 55,121.40 and 22,040.40

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Solution

The fourth proportional to 39,943.70, 55,121.40 and 22,040.40 is: 30,415.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,943.70 : 55,121.40 = 22,040.40 : x
  2. Step 2: Convert to fraction form
    39,943.70/55,121.40 = 22,040.40/x
  3. Step 3: Cross multiply
    39,943.70x = 55,121.40 × 22,040.40
  4. Step 4: Simplify right side
    39,943.70x = 1,214,897,704.56
  5. Step 5: Solve for x
    x = 1,214,897,704.56/39,943.70
  6. Step 6: Final answer
    x = 30,415.25

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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.