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Finding the Fourth Proportional to 36,756.80, 55,074.40 and 21,147.20

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Solution

The fourth proportional to 36,756.80, 55,074.40 and 21,147.20 is: 31,685.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,756.80 : 55,074.40 = 21,147.20 : x
  2. Step 2: Convert to fraction form
    36,756.80/55,074.40 = 21,147.20/x
  3. Step 3: Cross multiply
    36,756.80x = 55,074.40 × 21,147.20
  4. Step 4: Simplify right side
    36,756.80x = 1,164,669,351.68
  5. Step 5: Solve for x
    x = 1,164,669,351.68/36,756.80
  6. Step 6: Final answer
    x = 31,685.82

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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.