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Finding the Fourth Proportional to 36,694, 50,637.72 and 21,790

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Solution

The fourth proportional to 36,694, 50,637.72 and 21,790 is: 30,070.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,694 : 50,637.72 = 21,790 : x
  2. Step 2: Convert to fraction form
    36,694/50,637.72 = 21,790/x
  3. Step 3: Cross multiply
    36,694x = 50,637.72 × 21,790
  4. Step 4: Simplify right side
    36,694x = 1,103,395,918.80
  5. Step 5: Solve for x
    x = 1,103,395,918.80/36,694
  6. Step 6: Final answer
    x = 30,070.20

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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.