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Finding the Fourth Proportional to 36,110.80, 54,209.40 and 20,328.40

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Solution

The fourth proportional to 36,110.80, 54,209.40 and 20,328.40 is: 30,516.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,110.80 : 54,209.40 = 20,328.40 : x
  2. Step 2: Convert to fraction form
    36,110.80/54,209.40 = 20,328.40/x
  3. Step 3: Cross multiply
    36,110.80x = 54,209.40 × 20,328.40
  4. Step 4: Simplify right side
    36,110.80x = 1,101,990,366.96
  5. Step 5: Solve for x
    x = 1,101,990,366.96/36,110.80
  6. Step 6: Final answer
    x = 30,516.92

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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.