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Finding the Fourth Proportional to 39,855.49, 55,003.07 and 21,950.49

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Solution

The fourth proportional to 39,855.49, 55,003.07 and 21,950.49 is: 30,293.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,855.49 : 55,003.07 = 21,950.49 : x
  2. Step 2: Convert to fraction form
    39,855.49/55,003.07 = 21,950.49/x
  3. Step 3: Cross multiply
    39,855.49x = 55,003.07 × 21,950.49
  4. Step 4: Simplify right side
    39,855.49x = 1,207,344,568.27
  5. Step 5: Solve for x
    x = 1,207,344,568.27/39,855.49
  6. Step 6: Final answer
    x = 30,293.05

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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.