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Finding the Fourth Proportional to 39,171, 54,055.92 and 21,265.88

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Solution

The fourth proportional to 39,171, 54,055.92 and 21,265.88 is: 29,346.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,171 : 54,055.92 = 21,265.88 : x
  2. Step 2: Convert to fraction form
    39,171/54,055.92 = 21,265.88/x
  3. Step 3: Cross multiply
    39,171x = 54,055.92 × 21,265.88
  4. Step 4: Simplify right side
    39,171x = 1,149,546,708.01
  5. Step 5: Solve for x
    x = 1,149,546,708.01/39,171
  6. Step 6: Final answer
    x = 29,346.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.