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Finding the Fourth Proportional to 36,702.45, 55,071.90 and 20,919.60

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Solution

The fourth proportional to 36,702.45, 55,071.90 and 20,919.60 is: 31,389.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,702.45 : 55,071.90 = 20,919.60 : x
  2. Step 2: Convert to fraction form
    36,702.45/55,071.90 = 20,919.60/x
  3. Step 3: Cross multiply
    36,702.45x = 55,071.90 × 20,919.60
  4. Step 4: Simplify right side
    36,702.45x = 1,152,082,119.24
  5. Step 5: Solve for x
    x = 1,152,082,119.24/36,702.45
  6. Step 6: Final answer
    x = 31,389.79

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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.