Home / 36,756.80-55,135.20-21,161.60

Finding the Fourth Proportional to 36,756.80, 55,135.20 and 21,161.60

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Solution

The fourth proportional to 36,756.80, 55,135.20 and 21,161.60 is: 31,742.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,756.80 : 55,135.20 = 21,161.60 : x
  2. Step 2: Convert to fraction form
    36,756.80/55,135.20 = 21,161.60/x
  3. Step 3: Cross multiply
    36,756.80x = 55,135.20 × 21,161.60
  4. Step 4: Simplify right side
    36,756.80x = 1,166,749,048.32
  5. Step 5: Solve for x
    x = 1,166,749,048.32/36,756.80
  6. Step 6: Final answer
    x = 31,742.40

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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.