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Finding the Fourth Proportional to 13,791.87, 19,034.73 and 12,947.31

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Solution

The fourth proportional to 13,791.87, 19,034.73 and 12,947.31 is: 17,869.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.87 : 19,034.73 = 12,947.31 : x
  2. Step 2: Convert to fraction form
    13,791.87/19,034.73 = 12,947.31/x
  3. Step 3: Cross multiply
    13,791.87x = 19,034.73 × 12,947.31
  4. Step 4: Simplify right side
    13,791.87x = 246,448,550.08
  5. Step 5: Solve for x
    x = 246,448,550.08/13,791.87
  6. Step 6: Final answer
    x = 17,869.12

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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.