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Finding the Fourth Proportional to 39,841, 54,984.24 and 21,939.64

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Solution

The fourth proportional to 39,841, 54,984.24 and 21,939.64 is: 30,278.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,841 : 54,984.24 = 21,939.64 : x
  2. Step 2: Convert to fraction form
    39,841/54,984.24 = 21,939.64/x
  3. Step 3: Cross multiply
    39,841x = 54,984.24 × 21,939.64
  4. Step 4: Simplify right side
    39,841x = 1,206,334,431.27
  5. Step 5: Solve for x
    x = 1,206,334,431.27/39,841
  6. Step 6: Final answer
    x = 30,278.72

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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.