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Finding the Fourth Proportional to 43,504.60, 65,208.30 and 18,540.40

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Solution

The fourth proportional to 43,504.60, 65,208.30 and 18,540.40 is: 27,789.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,504.60 : 65,208.30 = 18,540.40 : x
  2. Step 2: Convert to fraction form
    43,504.60/65,208.30 = 18,540.40/x
  3. Step 3: Cross multiply
    43,504.60x = 65,208.30 × 18,540.40
  4. Step 4: Simplify right side
    43,504.60x = 1,208,987,965.32
  5. Step 5: Solve for x
    x = 1,208,987,965.32/43,504.60
  6. Step 6: Final answer
    x = 27,789.89

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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.