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Finding the Fourth Proportional to 36,912.64, 50,939.56 and 20,998.20

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Solution

The fourth proportional to 36,912.64, 50,939.56 and 20,998.20 is: 28,977.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,912.64 : 50,939.56 = 20,998.20 : x
  2. Step 2: Convert to fraction form
    36,912.64/50,939.56 = 20,998.20/x
  3. Step 3: Cross multiply
    36,912.64x = 50,939.56 × 20,998.20
  4. Step 4: Simplify right side
    36,912.64x = 1,069,639,068.79
  5. Step 5: Solve for x
    x = 1,069,639,068.79/36,912.64
  6. Step 6: Final answer
    x = 28,977.58

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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.