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Finding the Fourth Proportional to 36,507.80, 54,761.70 and 20,912.60

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Solution

The fourth proportional to 36,507.80, 54,761.70 and 20,912.60 is: 31,368.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,507.80 : 54,761.70 = 20,912.60 : x
  2. Step 2: Convert to fraction form
    36,507.80/54,761.70 = 20,912.60/x
  3. Step 3: Cross multiply
    36,507.80x = 54,761.70 × 20,912.60
  4. Step 4: Simplify right side
    36,507.80x = 1,145,209,527.42
  5. Step 5: Solve for x
    x = 1,145,209,527.42/36,507.80
  6. Step 6: Final answer
    x = 31,368.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.