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Finding the Fourth Proportional to 36,908.63, 50,936.64 and 20,998.20

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Solution

The fourth proportional to 36,908.63, 50,936.64 and 20,998.20 is: 28,979.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,908.63 : 50,936.64 = 20,998.20 : x
  2. Step 2: Convert to fraction form
    36,908.63/50,936.64 = 20,998.20/x
  3. Step 3: Cross multiply
    36,908.63x = 50,936.64 × 20,998.20
  4. Step 4: Simplify right side
    36,908.63x = 1,069,577,754.05
  5. Step 5: Solve for x
    x = 1,069,577,754.05/36,908.63
  6. Step 6: Final answer
    x = 28,979.07

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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.