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Finding the Fourth Proportional to 36,358.40, 54,470.40 and 20,729.60

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Solution

The fourth proportional to 36,358.40, 54,470.40 and 20,729.60 is: 31,056.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,358.40 : 54,470.40 = 20,729.60 : x
  2. Step 2: Convert to fraction form
    36,358.40/54,470.40 = 20,729.60/x
  3. Step 3: Cross multiply
    36,358.40x = 54,470.40 × 20,729.60
  4. Step 4: Simplify right side
    36,358.40x = 1,129,149,603.84
  5. Step 5: Solve for x
    x = 1,129,149,603.84/36,358.40
  6. Step 6: Final answer
    x = 31,056.09

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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.