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Finding the Fourth Proportional to 31,791.40, 43,876.01 and 18,362.64

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Solution

The fourth proportional to 31,791.40, 43,876.01 and 18,362.64 is: 25,342.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,791.40 : 43,876.01 = 18,362.64 : x
  2. Step 2: Convert to fraction form
    31,791.40/43,876.01 = 18,362.64/x
  3. Step 3: Cross multiply
    31,791.40x = 43,876.01 × 18,362.64
  4. Step 4: Simplify right side
    31,791.40x = 805,679,257.64
  5. Step 5: Solve for x
    x = 805,679,257.64/31,791.40
  6. Step 6: Final answer
    x = 25,342.68

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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.