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Finding the Fourth Proportional to 31,465.44, 43,427.88 and 18,891

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Solution

The fourth proportional to 31,465.44, 43,427.88 and 18,891 is: 26,072.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,465.44 : 43,427.88 = 18,891 : x
  2. Step 2: Convert to fraction form
    31,465.44/43,427.88 = 18,891/x
  3. Step 3: Cross multiply
    31,465.44x = 43,427.88 × 18,891
  4. Step 4: Simplify right side
    31,465.44x = 820,396,081.08
  5. Step 5: Solve for x
    x = 820,396,081.08/31,465.44
  6. Step 6: Final answer
    x = 26,072.93

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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.