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Finding the Fourth Proportional to 36,765.20, 55,147.80 and 21,990.80

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Solution

The fourth proportional to 36,765.20, 55,147.80 and 21,990.80 is: 32,986.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,765.20 : 55,147.80 = 21,990.80 : x
  2. Step 2: Convert to fraction form
    36,765.20/55,147.80 = 21,990.80/x
  3. Step 3: Cross multiply
    36,765.20x = 55,147.80 × 21,990.80
  4. Step 4: Simplify right side
    36,765.20x = 1,212,744,240.24
  5. Step 5: Solve for x
    x = 1,212,744,240.24/36,765.20
  6. Step 6: Final answer
    x = 32,986.20

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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.