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Finding the Fourth Proportional to 36,988.25, 51,043.79 and 20,221.25

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Solution

The fourth proportional to 36,988.25, 51,043.79 and 20,221.25 is: 27,905.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,988.25 : 51,043.79 = 20,221.25 : x
  2. Step 2: Convert to fraction form
    36,988.25/51,043.79 = 20,221.25/x
  3. Step 3: Cross multiply
    36,988.25x = 51,043.79 × 20,221.25
  4. Step 4: Simplify right side
    36,988.25x = 1,032,169,238.54
  5. Step 5: Solve for x
    x = 1,032,169,238.54/36,988.25
  6. Step 6: Final answer
    x = 27,905.33

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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.