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Finding the Fourth Proportional to 39,804.67, 54,930.44 and 21,899.29

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Solution

The fourth proportional to 39,804.67, 54,930.44 and 21,899.29 is: 30,221.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,804.67 : 54,930.44 = 21,899.29 : x
  2. Step 2: Convert to fraction form
    39,804.67/54,930.44 = 21,899.29/x
  3. Step 3: Cross multiply
    39,804.67x = 54,930.44 × 21,899.29
  4. Step 4: Simplify right side
    39,804.67x = 1,202,937,635.39
  5. Step 5: Solve for x
    x = 1,202,937,635.39/39,804.67
  6. Step 6: Final answer
    x = 30,221.02

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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.