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Finding the Fourth Proportional to 36,761.84, 55,053.93 and 20,918.87

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Solution

The fourth proportional to 36,761.84, 55,053.93 and 20,918.87 is: 31,327.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,761.84 : 55,053.93 = 20,918.87 : x
  2. Step 2: Convert to fraction form
    36,761.84/55,053.93 = 20,918.87/x
  3. Step 3: Cross multiply
    36,761.84x = 55,053.93 × 20,918.87
  4. Step 4: Simplify right side
    36,761.84x = 1,151,665,729.39
  5. Step 5: Solve for x
    x = 1,151,665,729.39/36,761.84
  6. Step 6: Final answer
    x = 31,327.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.