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Finding the Fourth Proportional to 31,791.87, 43,880.76 and 18,370.94

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Solution

The fourth proportional to 31,791.87, 43,880.76 and 18,370.94 is: 25,356.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,791.87 : 43,880.76 = 18,370.94 : x
  2. Step 2: Convert to fraction form
    31,791.87/43,880.76 = 18,370.94/x
  3. Step 3: Cross multiply
    31,791.87x = 43,880.76 × 18,370.94
  4. Step 4: Simplify right side
    31,791.87x = 806,130,589.71
  5. Step 5: Solve for x
    x = 806,130,589.71/31,791.87
  6. Step 6: Final answer
    x = 25,356.50

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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.