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Finding the Fourth Proportional to 36,906.90, 50,932.71 and 20,990.94

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Solution

The fourth proportional to 36,906.90, 50,932.71 and 20,990.94 is: 28,968.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,906.90 : 50,932.71 = 20,990.94 : x
  2. Step 2: Convert to fraction form
    36,906.90/50,932.71 = 20,990.94/x
  3. Step 3: Cross multiply
    36,906.90x = 50,932.71 × 20,990.94
  4. Step 4: Simplify right side
    36,906.90x = 1,069,125,459.65
  5. Step 5: Solve for x
    x = 1,069,125,459.65/36,906.90
  6. Step 6: Final answer
    x = 28,968.17

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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.